| # | Company | Employees |
|---|---|---|
| 1 | 11,608 | |
| 2 | 1,866 | |
| 3 |
Federal Reserve Bank of Chicagochicagofed.org
Support economic growth and financial stability across the Seventh Federal Reserve District, including Iowa, Illinois, Indiana, Michigan, and Wisconsin. |
1,651 |
| 4 |
First American Bankfirstambank.com
Full-service banking institution providing personalized financial solutions, expert lending, and comprehensive wealth management services to individuals, families, and businesses across multiple locations. |
1,250 |
| 5 |
Old Second National Bankoldsecond.com
This Chicago-area bank with over 150 years of experience prioritizes customer service, financial responsibility, and community growth in the region |
965 |
| 6 |
Heartland Bank and Trust Companyhbtbank.com
Community bank offering financial services to commercial, retail, and municipal customers in Illinois and eastern Iowa Emphasis on local management and fast, efficient service |
899 |
| 7 |
First Midwest Bankoldnational.com
A merged bank holding company with $46 billion in assets, ranking among the top 35 in the US, maintaining a community banking heritage |
898 |
| 8 |
GN Bankgnbank.net
Community-focused savings and loan association empowering Black residents with access to mortgage loans and quality housing for educational and employment opportunities |
781 |
| 9 |
Federal Home Loan Bank of Chicagofhlbc.com
Partner with members in Illinois and Wisconsin to provide competitively priced funding, investment returns, and community support activities. |
661 |
| 10 | 607 | |
| 11 |
Morton Community Bankhometownbanks.com
Financial institution offering a range of banking services, including checking accounts, wealth management, and commercial loans, with a focus on customer relationships and community involvement |
434 |
| 12 |
Consumers Credit Unionmyconsumers.org
Established in 1930 in Gurnee, IL, Consumers Credit Union is a large credit union with $32 billion in assets, serving over 200,000 members Providing personalized financial services |
368 |
| 13 |
The PrivateBankus.cibc.com
Financial services provider undergoing rebranding from The PrivateBank to CIBC, maintaining the same trusted team and services. |
328 |
| 14 |
State Street Bank, Quincy, ILstatestreetbank.com
An employee-owned community bank in Quincy, IL providing consumer and corporate banking services, supporting local economy with loans, and promoting community growth |
326 |
| 15 |
Marquette Bankemarquettebank.com
Community-focused bank with 20 branches in southwest Chicagoland, offering personal financial services, convenient access, and customer rewards programs. |
307 |
| 16 |
Banterra Bankbanterra.bank
A banking company providing leading products and services with excellent customer service, serving communities across six states since 1975 |
307 |
| 17 |
First State Bankfirststatebank.biz
Locally owned community bank offering exceptional products and services to serve the communities through branch visits and online access |
183 |
| 18 |
First Federal Savings Bankffsbweb.com
A mutually-owned bank established in 1889, serving North Central IL with full-service banking, from checking to home loans Emphasizes customer service |
182 |
| 19 |
Parkway Bank & Trust Companyparkwaybank.com
Locally owned financial institution providing a wide range of products and services with a commitment to growth and excellent customer service Member FDIC |
181 |
| 20 | 179 | |
| 21 |
Providence Bank & Trustprovidence.bank
A local community bank focused on serving and building vibrant neighborhoods by prioritizing customer needs and offering meaningful products and services |
178 |
| 22 |
United Community Banks IL MO FLucbbank.com
Full-service community bank in central Illinois, offering financial solutions and services to individuals, families, and businesses through multiple locations |
172 |
| 23 |
ABC Bankabcbank.net
A longstanding bank in Chicagoland offering retail, commercial, and wealth management services Stay updated on career opportunities, financial insights, and community involvement |
169 |
| 24 |
Citizens State Bankcsbnow.com
A full-service, independent, locally-owned community bank offering customized products and services with a commitment to customer satisfaction for over 140 years |
168 |
| 25 |
First Bank of Highland Parkfirstbankhp.com
A privately owned bank focused on building long-term relationships, providing exceptional service, and supporting the community for over 60 years |
165 |
| 26 |
Allied First Bank, sb.allliedfirst.com
A community bank serving Oswego and surrounding areas since 1994, offering consumer, commercial, and mortgage banking products with a focus on customer service and community involvement |
163 |
| 27 |
Sauk Valley Banksaukvalleybank.com
A community bank focused on personalized service and products for customers, while giving back to the community and building strong relationships |
155 |
| 28 |
BBMC Mortgagemutualmortgage.com
A community banking subsidiary offering mortgage solutions for homebuyers, refinancing options, and dedicated to putting the "Community" back into Community Banking |
153 |
| 29 |
INB, National Associationinb.com
Personal and commercial banking services including loans, lockbox services, and support for financial transactions, aiming to empower customers and businesses |
151 |
| 30 |
First Bankers Trust Company, NAfirstbankers.com
A community bank providing a range of banking products and services for personal and business needs FDIC member and Equal Housing Lender |
150 |
| 31 |
CNB Bank & Trust, N.A.cnbil.com
A community-oriented independent bank with 18 locations in Illinois & Missouri, offering a range of financial services as a Member FDIC and Equal Housing Lender |
150 |
| 32 |
Devon Bankdevonbank.com
An independent community bank in Chicagoland since 1945, offering personalized services, home financing, trust, investments, and business financing products |
146 |
| 33 |
American Community Bank & Trustamcombank.com
A financial institution offering personalized commercial and personal banking services, as well as wealth management solutions, with a strong focus on customer service and innovative financial strategies |
88 |
| 34 |
State Bank of The Lakessbotl.com
Financial holding company offering community banking, commercial banking, wealth management, insurance premium financing, mortgage origination, and other financial services in multiple locations |
81 |
| 35 |
Hinsdale Bank & Trusthinsdalebank.com
A financial institution offering community and commercial banking, wealth management, insurance premium financing, mortgage origination, and other financial services in several locations |
71 |
| 36 |
Soy Capital Bank and Trustsoybank.com
A financial services provider in Central Illinois offering personal and business banking, lending, trust services, wealth management, and insurance solutions |
67 |
| 37 |
Old Plank Trail Community Bankoldplanktrailbank.com
Financial services company offering traditional banking, wealth management, insurance premium financing, mortgage origination, and personalized banking solutions in several locations |
66 |
| 38 |
McHenry Savings Bank (Official Site)mchenrysavings.com
Financial services company providing a wide range of products including loans, mortgages, wealth management, and online banking with a focus on empowering clients |
56 |
| 39 |
Lake Forest Bank & Trustlakeforestbank.com
This financial holding company offers community and commercial banking, wealth management, insurance premium financing, mortgage origination, and more across various locations |
55 |
| 40 |
Continental National Bank (now First American Bank)firstambank.com
A financial institution acquired in 2019 that offers a wide range of personal, commercial, and wealth management services, focusing on customer relationships and personalized solutions |
53 |
| 41 |
NB&Texpireddomains.com
A stable financial institution offering full-service banking, loans, wealth management, securities, and community support through various services and local investments |
34 |
| 42 |
The Anna-Jonesboro National Bankajnational.com
A financial institution providing various banking services and products to customers on a national level |
29 |
| 43 |
Countryside Bankbankcountryside.com
A financial holding company providing community and commercial banking, wealth management, insurance premium financing, mortgage origination, and more in multiple locations |
29 |
| 44 |
Northbrook Bank & Trustnorthbrookbank.com
Financial holding company offering community and commercial banking, wealth management, insurance premium financing, mortgage origination, and other services in the Midwest and Florida |
27 |
| 45 |
Covenant Bankcovenant-bank.com
A financial institution providing various banking services and financial products to individuals and businesses |
26 |
| 46 |
Community Bank of Oak Park River Forestbylinebank.com
Locally owned bank providing financial solutions for individuals, businesses, and nonprofits in multiple communities Focus on exceptional products, services, and technology |
19 |
| 47 |
Forest Park Bankforestparkbank.com
Financial institution focused on building shareholder value, providing superior service, sustaining leadership, supporting the community, and fostering employee development |
17 |
| 48 |
Mazon State Bankmazonstatebank.com
A financial institution offering personal and business online banking, mortgages, home equity loans, wealth management, and investment services |
13 |
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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.
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