| # | Company | Employees |
|---|---|---|
| 1 |
Lancaster Universitylancaster.ac.uk
Leading higher education institution with global campuses, renowned for research, innovation, and positive impact locally and globally through diverse talent and top rankings |
5,683 |
| 2 |
Penn Medicine Lancaster General Healthpennmedicine.org
Comprehensive healthcare system offering hospital services, outpatient care, physician network, behavioral health, rehabilitation, and health sciences education across multiple facilities. |
4,900 |
| 3 |
Clark Associatesclarkassociatesinc.biz
A leading collective of dynamic companies in the food service industry offering equipment, supplies, and services with nationwide distribution and diverse customer base |
3,760 |
| 4 |
Graham Packaginggrahampackaging.com
A leader in sustainable packaging design, manufacturing, and sales for food, beverage, household, and automotive industries with global reach |
3,562 |
| 5 |
Eurofins Lancaster Laboratorieseurofinsus.com
A global contract laboratory providing comprehensive services in pharmaceutical, biopharmaceutical, and environmental sciences to a diverse range of clients worldwide |
3,426 |
| 6 |
Armstrong World Industriesarmstrongceilings.com
Design and manufacture innovative ceiling and wall systems enhancing aesthetics, acoustics, well-being, and sustainability in various interior spaces. |
3,186 |
| 7 |
Fulton Bankfultonbank.com
A community-oriented bank focused on personalized service, financial solutions, and fostering lasting relationships while promoting equality and career growth |
2,886 |
| 8 |
Donnelley Financial Solutions (DFIN)dfinsolutions.com
It provides risk and compliance solutions, leveraging technology and data insights to support businesses throughout their investment lifecycles. |
2,331 |
| 9 |
Eurofins Environment Testing (USA)eurofinsus.com
Provides comprehensive environmental testing services across the US, including air, water, soil, hazardous waste, and indoor air quality analysis for various sectors. |
1,966 |
| 10 |
Franklin & Marshall Collegefandm.edu
The company is a residential undergraduate liberal arts college in Lancaster, PA, providing a cooperative learning environment and stellar academic program |
1,539 |
| 11 |
Antelope Valley Medical Centeravmc.org
A 420-bed acute care hospital serving nearly 1 million residents in Southern California, offering trauma, stroke, cancer, neonatal care, and more |
1,404 |
| 12 |
FFE Transportation Servicesffeinc.com
The company is the largest temperature-controlled trucking company in the US, offering specialized services for frozen and cooler shipments nationwide |
1,319 |
| 13 |
Antelope Valley Union High School Districtavdistrict.org
A school district serving 23,000 students with traditional and alternative high schools, career academies, pathways, adult education, and online programs |
1,305 |
| 14 |
Smilebuilderz LLCsmilebuilderz.com
Family dental health care provider offering general dentistry, cleanings, and specialty services like root canals, orthodontics, and implants In-network with most insurance plans |
1,251 |
| 15 |
Antelope Valley Collegeavc.edu
The company provides a comprehensive education through associate degree programs, career technical programs, and transfer/general education courses for student success |
1,190 |
| 16 |
Fairfield Medical Centerfmchealth.org
A vibrant healthcare organization providing exceptional care, dedicated to creating a positive impact on the community through personal growth and unparalleled employee support |
1,187 |
| 17 |
High Companieshigh.net
A group of companies based in Lancaster, PA providing a range of services including steel structures, concrete, construction, architecture, real estate, hotels, and environmental consulting |
1,172 |
| 18 |
School District of Lancasterschooljobs.com
Dedicated team working to create an equitable school system in City of Lancaster, ensuring every child has opportunities to succeed |
1,016 |
| 19 |
Lancaster-Lebanon IU13iu13.org
Educational service provider serving 22 school districts in Lancaster and Lebanon, PA with a range of services including conference center, special needs support, and technology services |
919 |
| 20 |
Fulton Financial Corporationfultonbank.com
A regional financial holding company offering a wide range of products and services, focused on building lasting relationships and providing excellent customer service |
871 |
| 21 |
Berkshire Hathaway HomeServices Homesale Realtyhomesale.com
Real estate company providing a wide range of services including realty, mortgage, insurance, warranty, property management, relocation, and customer care |
849 |
| 22 |
Pharmacist Societypharmacistsociety.com
An online medical community exclusively for verified Pharmacists, facilitating specialized consultation, communication, and information exchange within a secure platform Built for Pharmacists |
784 |
| 23 |
City of Lancastercityoflancasterca.org
Diverse community fostering innovation in science, technology, art, and culture Leading USA with expertise, spirit, and imagination for a better tomorrow |
768 |
| 24 |
HOPE Internationalhopeinternational.org
A Christian non-profit providing Christ-centered financial services to empower families in underserved communities through savings groups and microfinance institutions worldwide |
758 |
| 25 |
School District Of Lancasterpa.us
A diverse school district established in 1836 with approximately 11,500 students and 1,585 staff members in Pennsylvania |
742 |
| 26 |
Eurofins BioPharma Product Testing North Americaeurofinsus.com
Global network of GMP product testing labs for pharmaceutical and medical device companies offering comprehensive services, methodologies, and personalized solutions worldwide |
653 |
| 27 |
RKL LLPrklcpa.com
A leading advisory firm offering tax, accounting, financial management, workforce strategies, private wealth, and technology solutions to help organizations succeed |
632 |
| 28 |
Nutramax Laboratoriesnutramaxlabs.com
The company provides safe, effective products with high-quality ingredients and manufacturing standards for improved quality of life internationally |
627 |
| 29 |
Fairfield County, Ohiofairfieldcountyohio.gov
Local government serving Fairfield County Ohio, with responsibilities including managing county seat Lancaster and other cities/villages within the county |
578 |
| 30 |
Willow Valley Communitieswillowvalleycommunities.org
Dedicated to enriching lives of 55+ seniors and team members through innovative programming, operational excellence, and creating a great community |
570 |
| 31 |
Founders Federal Credit Unionfoundersfcu.com
A not-for-profit financial institution offering lifetime benefits to individuals in qualifying communities in the Carolinas, with a focus on member financial goals |
554 |
| 32 |
Chartwell Staffing Solutionspartnerspersonnel.com
A top woman-owned staffing agency with 44 locations across the US, providing qualified employees for a wide range of industries |
545 |
| 33 |
Lancaster Bible Collegelbc.edu
The company provides intentional education experiences that are biblical, transformational, experiential, and missional through online and on-site training |
518 |
| 34 |
Woodstream Corporationwoodstream.com
A consumer product company focused on innovation, quality, safety, and customer service, with a strategy of growth through acquisitions, brand awareness, and market expansion |
514 |
| 35 |
Armstrong Flooringโขarmstrongflooring.com
Manufacture and supply of sustainable, creative, and high-quality flooring products focused on integrity and building strong customer relationships. |
498 |
| 36 |
OneWell Health Careonewell.org
We collaborate with individuals, families, and care teams to create personalized care plans based on their needs and preferences |
483 |
| 37 |
FreshRealmfreshrealm.com
FreshRealm designs innovative fresh meals platforms to help partners meet consumer demand cost-effectively, offering scale, data, culinary expertise, and nationwide fulfillment |
473 |
| 38 |
Upstate Niagara Cooperative, Inc.uncdairy.com
A cooperative of family-owned farms producing award-winning dairy products with a focus on nourishing lives and striving for sustainable growth |
469 |
| 39 |
EHDehdinsurance.com
Established in 1896, a leading full-service insurance broker with a strong focus on clients and employees, experiencing continual growth and expansion |
440 |
| 40 |
WhiteOakgowhiteoak.com
A leading provider of print and digital marketing solutions, offering a range of services like web-to-print, variable data printing, and promotional products to drive business growth |
437 |
| 41 |
OpSec Securityopsecsecurity.com
Global leader in brand protection, offering physical security tech, track and trace services, and online monitoring to safeguard brands against counterfeiting and unauthorized distribution |
417 |
| 42 |
Jay Groupjaygroup.com
Provides award-winning omnichannel fulfillment, advanced packaging, warehousing, and freight solutions with tech-driven logistics, including eCommerce, retail, and value-added services. |
415 |
| 43 |
TRICOR Insurancetricorinsurance.com
A leading independent insurance agency offering personal, business, and employee benefits coverage with a focus on proactive protection and tailored solutions |
384 |
| 44 |
Wohlsen Construction Companylinktr.ee
A construction company founded in 1890, offering preconstruction, management, contracting, and design/build services in the Mid-Atlantic and Northeast Regions Specializes in various markets |
366 |
| 45 |
Lancaster General Hospitallancastergeneralhealth.org
A healthcare delivery system in Lancaster, Pennsylvania known for excellence, compassion, quality, and cost effectiveness in healthcare services |
356 |
| 46 |
Thaddeus Stevens College of Technologystevenscollege.edu
A premier technical college in Pennsylvania offering accredited two-year programs in high-demand fields, preparing students for skilled employment opportunities with strong job prospects |
339 |
| 47 |
Lancaster & Morecambe Collegelmc.ac.uk
Provider of top quality education and training, offering academic, vocational, and customized courses to help individuals reach their full potential Also offers work-based learning opportunities |
338 |
| 48 |
RETTEWrettew.com
RETTEW provides a wide range of engineering, environmental, surveying, planning, and safety consulting services, focusing on quality, safety, innovation, and client satisfaction |
328 |
| 49 |
Ecology and Environment, Inc.wsp.com
A company that was formerly E&E is now WSP USA, offering services in engineering, environmental consulting, and infrastructure development |
325 |
| 50 |
Conestoga Valley School Districtconestogavalley.org
A public school district serving over 4,300 students in grades K-12, offering strong academic programs, caring teaching staff, and diverse educational opportunities |
313 |
| 51 |
APR Supply Co.aprsupply.com
A fourth-generation wholesale distributor of plumbing, HVAC, industrial PVF, irrigation, and landscape lighting products with locations in Pennsylvania, New Jersey, and Delaware |
297 |
| 52 |
Eurofins Central Laboratoryeurofinscentrallaboratory.com
Global provider of high quality central laboratory services supporting all phases of clinical trials, offering a wide range of laboratory testing solutions worldwide |
261 |
| 53 |
SACAsacapa.org
A non-profit organization providing support and services to marginalized communities in Lancaster, focusing on basic needs, unique gifts, and overcoming roadblocks |
213 |
| 54 |
Kalas Manufacturing, Inc.kalaswire.com
Manufacturing quality copper wire and cable, offering bulk welding and battery cable, welding assemblies, and customization options with superior control and service. |
208 |
| 55 |
Advanced Cooling Technologies, Inc.1-act.com
Develops passive and active thermal solutions for demanding environments. Focuses on performance, reliability, and efficiency across aerospace, defense, and industrial systems. |
197 |
| 56 | 184 | |
| 57 | 180 | |
| 58 |
South Central Power Companysouthcentralpower.com
An electric cooperative serving over 123,000 customers in 24 Ohio counties, maintaining 12,000+ miles of power lines, and being Ohio's largest cooperative |
175 |
| 59 |
Lancaster Mennonite Schoollancastermennonite.org
A PreK-12 school focusing on educational excellence, Christ-centered values, community, peace, service, and faith-infused opportunities to transform students |
172 |
| 60 |
Lifelong Learning Administration Corporationllac.org
Lifelong Learning revolutionizes school back offices, saving time and money for partners while offering comprehensive services for educators to focus on students |
172 |
| 61 |
Harbor Complianceharborcompliance.com
A leading provider of compliance solutions for organizations, offering expertise, purpose-built software, and exceptional client experiences across all industries |
171 |
| 62 |
Excentia Human Servicesexcentiahumanservices.org
A nonprofit organization in Lancaster County offering comprehensive services for individuals with developmental needs and autism, spanning from childhood to adulthood |
168 |
| 63 |
Wellspringwellspringgift.com
Providing stylish personal accessories, hand-made fashion and home items, including best-selling Flip Notes, scarves, purses, curios, and table top gifts Gift destination |
167 |
| 64 |
Trout CPAtroutcpa.com
An accounting firm in Pennsylvania offering personalized tax, financial statement, and business advisory services, including Outsourced Accounting and Technology Advisory |
162 |
| 65 |
Crestview Rehabilitation & Skilled Nursing Servicescrestviewrehab.com
A family-owned rehabilitation and skilled nursing facility in Ohio offering quality care in a home-like environment with aquatic therapy services |
162 |
| 66 |
Motivair by Schneider Electricmotivaircorp.com
Specializing in liquid cooling and data center cooling infrastructure, it supports advanced technologies for various industries worldwide |
161 |
| 67 |
Ecore Internationalecoreintl.com
Ecore Athletic offers safe, ergonomic, and acoustic performance surfaces for sports, fitness, and student recreation markets, utilizing reclaimed materials |
158 |
| 68 |
Dallas College Cedar Valley Campusdcccd.edu
The Dallas College Cedar Valley Campus provides exemplary teaching and learning experiences on a scenic campus, preparing students for success |
157 |
| 69 |
Sealing Devices Inc.sealingdevices.com
Manufacturer and fabricator of gaskets, o-rings, seals, and molded rubber parts, offering expert engineering assistance and a wide range of sealing solutions |
156 |
| 70 |
Lancaster Country Clublancastercc.com
A prestigious private club offering golf, tennis, paddle courts, and a competition swimming pool on over 400 acres in Pennsylvania |
155 |
| 71 |
The Wenger Groupthewengergroup.com
A family-owned agricultural organization in the Mid-Atlantic Region, providing feeds, eggs, grain, fertilizer, and allied services, with a focus on integrity, quality, respect, safety, and stewardship |
154 |
| 72 |
Verdant Parksverdantleisure.co.uk
Boutique holiday park operator in Scotland, Northern England, and Devon offering self-catering holidays, holiday home ownership, luxury caravans, and lodges for sale |
154 |
| 73 |
Lancaster Nursing and Rehabilitation Centerlancasterhcg.com
Dedicated healthcare provider offering skilled services such as short term rehabilitation, ventilator care, memory care, and long term hospice and respite care |
152 |
| 74 |
Clark National Accountsclarknationalaccounts.com
Tech-driven distribution company with a focus on ecommerce QuickSupply for foodservice equipment, national accounts, design services, and custom warehousing |
151 |
| 75 |
ProCareprocare-medical.com
A national provider of healthcare products focused on safety for caregivers and comfort for residents, offering solutions for hospitals, long term care, and community settings |
147 |
| 76 |
City of Lancaster, Pennsylvaniacityoflancasterpa.gov
The company is based in Lancaster City, focusing on historic preservation, arts, safe neighborhoods, entrepreneurship, and celebrating cultural diversity |
147 |
| 77 |
Lancaster Behavioral Health Hospitallancasterbehavioral.org
The company provides behavioral health services through inpatient and outpatient programs to support individuals struggling with mental illness |
146 |
| 78 |
Godfreygodfrey.com
Full-service B2B marketing agency specializing in complex industries, collaborating with companies to deliver top-notch marketing solutions globally |
122 |
| 79 |
AP Murraylocations.ajg.com
A reputable provider of risk management and insurance services since 1930, offering innovative solutions and dedicated personal support to clients |
94 |
| 80 |
Saia Logisticslinkex.us
A customer-focused logistics and transportation management company that offers multi-modal solutions for domestic and international clients, emphasizing quality, cost-effectiveness, and on-time delivery |
88 |
| 81 |
Pfannenberg USApfannenbergusa.com
The company engineers and produces thermal management solutions for industrial electrical enclosures, helping prevent overheating and ensuring consistent operation in various industries |
71 |
| 82 |
Eurofins Medical Device Services USeurofins.com
Global network of laboratories offering comprehensive testing services for medical devices, assisting with verification, validation, regulatory compliance, and market access worldwide |
69 |
| 83 |
Septodont North Americaseptodontusa.com
This company specializes in providing information, updates, products, services, and events related to dental solutions in the US and Canada |
50 |
| 84 |
Horst Insurancehorstinsurance.com
Specializing in risk management consulting and comprehensive insurance programs, we are dedicated to protecting individuals, businesses, and employees with exceptional service |
47 |
| 85 |
Iron Valley Real Estate of Lancasterironvalleyrealestateoflancaster.com
A full service real estate brokerage assisting buyers, sellers, and investors in transactions across all price ranges and property types |
43 |
| 86 |
Quantum Basequantumbase.com
A world leader in Quantum Security, developing mass producible solutions based on quantum mechanics for 100% secure digital information |
39 |
| 87 |
MXL Industries - A PLASKOLITE COMPANYplaskolite.com
A manufacturer specializing in optical plastic parts, injection molding, coating, routing, and assembly operations, with a focus on stringent optical performance requirements |
33 |
| 88 |
accessplanitaccessplanit.com
A company guiding training providers with expert knowledge and software solutions to achieve desired results in their training programs |
32 |
| 89 |
Photonis USAphotonis.com
Photonis USA operates three factories in PA, MA, and TX producing frequency generators, electron multiplication devices, and digital day/night cameras for various industries |
30 |
| 90 |
ETEMCOetemco.net
A full-service electronic and electromechanical manufacturing company providing high-quality products, on-time delivery, and exceptional customer service based on trust and integrity |
29 |
| 91 |
Lehmann Ingredientslehmanningredients.co.uk
Established supplier of high quality ingredients to the food manufacturing industry with a focus on food safety, quality, and customer satisfaction |
16 |
| 92 |
Schedule Engineservicetitan.com
The company provides appointment scheduling solutions for home service contractors, enabling them to book more jobs and deliver a convenient customer experience 24/7 |
13 |
| 93 |
Square One Coffee Roasterssquareonecoffee.com
An award-winning specialty coffee roaster based in Pennsylvania offering freshly roasted coffee, barista training, and coffee equipment services |
13 |
| 94 |
Atkinsons Coffee Roastersatkinsonscoffee.com
Sourcing direct from farmers and artisan roasting on vintage equipment while operating award-winning cafes and providing professional brewing training for enthusiasts. |
13 |
| 95 |
Banks Lyon Jewellersbankslyon.co.uk
Award-winning luxury watch and jewellery retailer in the North West region, with showrooms in Lancaster and Kendal |
12 |
| 96 |
Reyna ITSreynaits.com
Information Technology Services company providing cloud services, IT consulting, application development, and technology solutions for small to medium-sized businesses and government agencies |
11 |
| 97 |
GFS Logisticsgfslogistics.com
A company offering eCommerce fulfillment, warehousing, project kitting, and logistics services for B2B and B2C, focusing on order fulfillment and delivery strategies |
11 |
| 98 |
AtmosFEAR! Scare Entertainmentatmosfearuk.com
Europe's leading scare entertainment production company, specializing in designing, producing, and operating immersive scare attractions, mazes, scream parks, and entertainment experiences |
10 |
| 99 |
Lancaster Parts & Equipmentlancasterpartsandequipment.com
A provider of high-quality farm equipment such as hammer mills, bale grabbers, and aftermarket parts, with a focus on excellent service and affordability |
10 |
| 100 |
Coleson Fine Clothierscolesonclothiers.com
Luxury and bespoke clothing provider in Central Pennsylvania sourcing quality products from European family-owned mills and NYC fashion week |
2 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
The same list elsewhere in United States
- The largest companies in the United States 91,669
- The largest companies in California 12,813
- The largest companies in New York State 10,485
- The largest companies in Texas 8,086
- The largest companies in Florida 4,945
- The largest companies in Illinois 4,175
- The largest companies in Pennsylvania 3,110
- The largest companies in Massachusetts 3,093
- The largest companies in Georgia 2,632
- The largest companies in Ohio 2,618
- The largest companies in New Jersey 2,569
- The largest companies in Virginia 2,503
- The largest companies in Michigan 2,346
- The largest companies in North Carolina 2,174
- The largest companies in Alabama 1,806
- The largest companies in Washington State 1,785
- The largest companies in Colorado 1,774
- The largest companies in Minnesota 1,700
- The largest companies in Maryland 1,527
- The largest companies in Wisconsin 1,482
- The largest companies in New York 6,920
- The largest companies in San Francisco 2,030
- The largest companies in Houston 1,791
- The largest companies in Chicago 1,668