| # | Company | Employees |
|---|---|---|
| 1 |
UC San Diego Healthemployment.ucsd.edu
A leading academic health system in San Diego region, offering outstanding patient care, cutting-edge research, medical education, and community health programs |
10,962 |
| 2 |
San Diego State Universitysdsu.edu
Top-ranked public research institution offering transformative experiences, international opportunities, diversity initiatives, and vibrant campus life for over 36,000 students |
9,764 |
| 3 |
San Diego Unified School Districtlinktr.ee
A diverse and inclusive educational institution in San Diego with over 221 facilities, serving 132,000 students to prepare them for college and career success |
9,483 |
| 4 |
National Universitynu.edu
National University provides accessible education to working professionals, offering diverse degree programs and innovative formats to empower positive change in communities |
7,573 |
| 5 |
University of San Diegosandiego.edu
Private Catholic university offering liberal arts education focused on academic excellence, social justice, peace, and sustainability values. |
4,593 |
| 6 |
Poway Unified School Districtpowayusd.com
A leading K-12 public education provider in northern San Diego County, operating a variety of schools serving over 36,000 students |
3,118 |
| 7 |
ACES (Comprehensive Educational Services)acesaba.com
Provide professional autism and special needs services including therapy, education, and support in homes, schools, and communities nationwide. |
2,611 |
| 8 |
San Diego Zoo Wildlife Alliancesandiegozoowildlifealliance.org
A nonprofit conservation leader inspiring passion for nature, working globally to conserve wildlife through innovation, partnerships, and education initiatives |
2,038 |
| 9 |
Point Loma Nazarene Universitypointloma.edu
Liberal arts university in San Diego offering over 60 undergraduate programs, graduate program centers, and serving over 4,600 students since 1902 |
1,966 |
| 10 |
San Diego Community College Districtsdccd.edu
The company is a large community college district in California, offering a variety of programs to approximately 100,000 students annually |
1,529 |
| 11 |
American Council on Exercise (ACE Fitness)acefitness.org
A nonprofit organization certifying exercise professionals and health coaches, conducting research, convening experts, working with communities, and advocating for physical activity policies |
1,514 |
| 12 |
San Diego County Office of Educationsdcoe.net
Leading innovation in education, the company supports school districts with cost-effective resources, staff development, and services to ensure all students thrive |
1,300 |
| 13 |
Alliant Universityalliant.edu
A private university offering graduate programs in psychology, education, business management, and forensic studies with a focus on practical applications Operating in multiple locations |
1,239 |
| 14 |
UC San Diego School of Medicinemedschool.ucsd.edu
Dedicated to advancing understanding and treatment of human diseases through translational research, clinical care, and education for a healthier world |
1,201 |
| 15 |
High Tech Highhightechhigh.org
This organization is a network of sixteen charter schools in San Diego County, focused on equity, personalization, authentic work, and collaborative design |
1,109 |
| 16 |
Elevo Learningelevolearning.com
This organization provides in-school and out-of-school programs to support the well-being and academic success of students, partnering with districts across California |
1,080 |
| 17 |
Art of Problem Solvingartofproblemsolving.com
Developing educational opportunities for top students worldwide in math and expanding into other subjects, with a focus on online learning |
967 |
| 18 |
San Diego Mesa Collegesdmesa.edu
A leading community college in California offering over 196 degrees/certificates, including the first bachelor's degree program amongst community colleges |
923 |
| 19 |
San Diego City Collegesdcity.edu
The company provides a variety of educational programs, career technical education, basic skills instruction, and student support services to help students achieve their goals |
786 |
| 20 |
Bridgepoint Educationbridgepointeducation.com
An innovative higher education company focused on accessibility and student success, offering online programs with custom content and interactive learning experiences |
725 |
| 21 |
Northcentral Universitynu.edu
A regionally accredited university offering bachelor's, master's, doctoral programs in various fields, with a one-to-one teaching model for student success |
686 |
| 22 |
AVID Centeravid.org
This company aims to bridge the opportunity gap by equipping students for college, career readiness, and success in a global society #AVID4Possibility |
619 |
| 23 |
San Diego Miramar Collegesdmiramar.edu
The company prepares students for success through quality instruction, emphasizing innovation, diversity, and partnerships for transfer preparation, workforce training, and career advancement |
559 |
| 24 |
The Honor Foundationhonor.org
A career transition program for US Special Operations Forces that helps them transition their elite military service to the private sector |
545 |
| 25 |
SZABISTszabist.ac.ae
A globally recognized institute focused on providing excellence in education, research, and producing highly qualified personnel in science and technology |
533 |
| 26 |
Robbins Research Internationaltonyrobbins.com
Specializes in conducting personal development, sales, and corporate seminars covering mental conditioning, personal achievement, communication, and business mastery topics |
508 |
| 27 |
Pacific College of Health and Sciencepacificcollege.edu
Offers education in acupuncture, Chinese herbal medicine, integrative medicine, and massage therapy with a focus on natural health practices and professional training |
501 |
| 28 |
Nan McKay and Associates (NMA)nanmckay.com
A leading provider of innovative solutions for communities nationwide, specializing in compliance-focused services for housing authorities, property management companies, and municipalities |
483 |
| 29 |
Neighborhood House Associationneighborhoodhouse.org
A multi-purpose human services organization dedicated to improving the quality of life for underserved individuals and families in San Diego County |
411 |
| 30 |
Francis Parker Schoolfrancisparker.org
A K-12 educational institution focused on fostering academic excellence, global perspective, and character development to prepare students to positively impact the world |
392 |
| 31 |
Tony Robbinstonyrobbins.com
A leading entrepreneur, bestselling author, and strategist empowering millions worldwide through books, seminars, and personal development events, with a focus on financial freedom and precision medicine |
388 |
| 32 |
University of San Diego School of Lawsandiego.edu
Private law school offering rigorous legal education, high bar exam pass rates, distinguished faculty, and a strong national and international alumni network. |
376 |
| 33 |
TakeLessonsaka.ms
An educational platform offering free daily classes and private lessons to easily learn anything at any time |
354 |
| 34 |
California Western School of Lawlinktr.ee
An independent law school in San Diego educating lawyers to be ethical problem solvers, offering various degree and concentration programs Providing access to justice through clinical programs |
335 |
| 35 |
English4Kidsenglish4kidsonline.com
Online English academy using Automatic Fluency method to teach kids in Latin America fluent English quickly Thousands of students and hundreds of teachers |
329 |
| 36 |
San Diego Center for Childrencenterforchildren.org
Nonprofit organization offering mental health and educational programs for children and families in the San Diego region since 1887 Visit wwwcenterforchildrenorg for more information |
323 |
| 37 |
Goodwill Industries of San Diego Countysdgoodwill.org
The company provides employment and training opportunities to individuals with disabilities and other barriers to employment |
318 |
| 38 |
SAY San Diego (Social Advocates for Youth)saysandiego.org
A nonprofit organization providing services in education, child and family support, mental health counseling, substance abuse prevention, and community partnerships |
307 |
| 39 |
Cathedral Catholic High Schoolcathedralcatholic.org
A Catholic high school providing innovative academic programs grounded in faith and preparing graduates to live out God's call |
249 |
| 40 |
Dr. Sears Wellness Institutedrsearswellnessinstitute.org
A leading provider of Health Coach Certifications globally, offering accredited programs with education, resources, and support for individuals and organizations |
221 |
| 41 |
IDEA Health & Fitness Associationideafit.com
A leading organization providing fitness education, resources, and conferences to health and wellness professionals worldwide, based in San Diego, California |
205 |
| 42 |
San Diego Workforce Partnershipworkforce.org
The company focuses on helping job seekers improve economic mobility, supporting businesses for equitable growth, and preparing youth for the workforce |
184 |
| 43 |
TradersCoach.comtraderscoach.com
A company providing top-quality educational services for traders in financial markets, emphasizing the importance of being a successful trader |
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 Nov 2, 2026.
More company lists in San Diego
- The largest companies in San Diego 826
- Manufacturers in San Diego 64
- Hardware manufacturers in San Diego 63
- SaaS companies in San Diego 59
- Retail chains in San Diego 58
- Software Development companies in San Diego 54
- IT Services and IT Consulting companies in San Diego 53
- Financial services firms in San Diego 51
- Financial Services companies in San Diego 46
- Pharmaceutical companies in San Diego 42
- Biotechnology Research companies in San Diego 41
- AI companies in San Diego 40
- Publicly traded companies in San Diego 39
- IT services companies in San Diego 39
- Healthcare providers in San Diego 34
- Critical infrastructure operators in San Diego 33
- Hotel and hospitality groups in San Diego 33
- Hospitals and Health Care companies in San Diego 29
- Aerospace and defence companies in San Diego 28
- Advertising Services companies in San Diego 28
- E-commerce companies in San Diego 27
- Energy companies in San Diego 27
- Real Estate companies in San Diego 27
- Marketing and communications agencies in San Diego 26
The same list elsewhere in United States
- Education providers in California 952
- Education providers in New York State 656
- Education providers in Texas 531
- Education providers in Pennsylvania 373
- Education providers in Illinois 370
- Education providers in Massachusetts 313
- Education providers in Florida 260
- Education providers in Virginia 224
- Education providers in Ohio 223
- Education providers in Michigan 212
- Education providers in Georgia 209
- Education providers in North Carolina 208
- Education providers in New Jersey 190
- Education providers in Washington State 169
- Education providers in Alabama 164
- Education providers in Arizona 152
- Education providers in Maryland 151
- Education providers in Minnesota 149
- Education providers in Indiana 144
- Education providers in Missouri 130
- Education providers in Tennessee 125
- Education providers in Wisconsin 124
- Education providers in New York 284
- Education providers in Chicago 138