Law firm directory
Law Firms in Illinois
396 law firms in 98 Illinois cities, including Chicago, Peoria, Champaign. Ranked by size, with addresses and websites.
- Law firms
- 396
- Cities
- 98
- Ranked by size
- 14
Firms in Illinois
The Largest Law Firms in Illinois
396 firms · page 1 of 16
- 01Kirkland & Ellis LLPChicago, IL3,629 U.S. lawyersHeadquarters
- 02Greenberg Traurig, LLPChicago, IL2,364 U.S. lawyers360 North Green Street
- 03Sidley Austin LLPChicago, IL1,693 U.S. lawyersHeadquarters
- 04McDermott Will & Schulte LLPChicago, IL1,370 U.S. lawyersHeadquarters
- 05Morgan & MorganChicago, IL1,270 U.S. lawyers55 East Monroe Street
- 06Mayer Brown LLPChicago, IL1,190 U.S. lawyersHeadquarters
- 07Seyfarth Shaw LLPChicago, IL908 U.S. lawyersHeadquarters
- 08Winston Taylor LLPChicago, IL908 U.S. lawyersHeadquarters
- 09Katten Muchin Rosenman LLPChicago, IL598 U.S. lawyersHeadquarters
- 10Hinshaw & Culbertson LLPChicago, IL577 U.S. lawyersHeadquarters
- 11Jenner & Block LLPChicago, IL534 U.S. lawyersHeadquarters
- 12O'Hagan MeyerChicago, IL389 U.S. lawyersHeadquarters
- 13Vedder Price P.C.Chicago, IL336 U.S. lawyersHeadquarters
- 14Chapman and Cutler LLPChicago, IL282 U.S. lawyersHeadquarters
- 151818Chicago, IL200 West Monroe Street
- 16Acosta & AssociatesSt. Charles, IL100 Illinois Street
- 17Alex Rafferty III, Attorney At LawWaukegan, IL9 North County Street
- 18Allan C. AlongiHinsdale, IL
- 19Allen & Korkowski & AssociatesRantoul, IL123 North Garrard Street
- 20Anderson & BobackChicago, IL20 North Clark Street
- 21Anderson Law OfficeGrayslake, IL11 North Slusser Street
- 22Angelillo LawLa Grange, IL
- 23Ansari & Shapiro, LLCChicago, IL211 West Wacker Drive
- 24Attorney at Law Bruce E. MattaCollinsville, IL
- 25Attorney Michael J. SmithRockford, IL
Cities
Law Firms by City in Illinois
- Chicago83
- Peoria23
- Champaign20
- Naperville16
- East Peoria13
- Rockford13
- Urbana12
- La Grange11
- Decatur9
- Brookfield8
- Marion8
- Bloomington5
- Joliet5
- Springfield5
- Alton4
- Belvidere4
- Loves Park4
- Mascoutah4
- Morton4
- Oak Park4
- Oswego4
- Plainfield4
- Schaumburg4
- Woodstock4
- Yorkville4
- Aurora3
- Berwyn3
- Edwardsville3
- Geneseo3
- Glen Carbon3
- Harrisburg3
- Hinsdale3
- Macomb3
- Oak Brook3
- Skokie3
- Taylorville3
- Wauconda3
- Waukegan3
- Wheaton3
- Arlington Heights2
- Belleville2
- Cairo2
- Cicero2
- Collinsville2
- East Saint Louis2
- Elgin2
- Evanston2
- Gurnee2
- Hillside2
- Homer Glen2
- Lake Forest2
- Maryville2
- Mokena2
- Morrison2
- Palos Hills2
- Rantoul2
- Savoy2
- St. Charles2
- West Dundee2
- Antioch1
- Carol Stream1
- Carterville1
- Deerfield1
- Des Plaines1
- Dixon1
- Earlville1
- Effingham1
- Elmhurst1
- Fairbury1
- Fairview Heights1
- Flossmoor1
- Fulton1
- Geneva1
- Glenview1
- Granite City1
- Grayslake1
- Great Lakes1
- Greenville1
- Herrin1
- Hoffman Estates1
- Lombard1
- Metropolis1
- Milan1
- Mount Prospect1
- Northbrook1
- Northlake1
- Orland Park1
- Palatine1
- Palos Heights1
- Park Ridge1
- Pecatonica1
- Plano1
- Robinson1
- Salem1
- Shelbyville1
- Sycamore1
- Warrenville1
- Wilmington1
Questions
Law Firms in Illinois
- How many law firms are in Illinois?
- The directory lists 396 law firms across 98 cities in Illinois. The cities with the most firms are Chicago, Peoria, Champaign.
- What is the largest law firm in Illinois?
- By U.S. lawyer headcount in The Law360 400 (2026), the largest firm with an office listed in Illinois is Kirkland & Ellis LLP, with 3,629 lawyers in the United States. That count covers the whole firm, not only its Illinois office.
- How many Illinois law firms are ranked by size?
- 14 of the firms listed in Illinois appear in The Law360 400 (2026). The rest are listed alphabetically, since most small and midsize firms do not publish a headcount.
Other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Washington, D.C.
- Florida
- Georgia
- Hawaii
- Idaho
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Office locations © OpenStreetMap contributors. Lawyer counts from The Law360 400 (2026). A listing is not an endorsement.
For the firms in this directory
Is your firm the one people find first in Illinois?
Your listing tells a prospective client where you are. Your website decides whether they call. We build law firm websites that win that decision, live in seven days, with no monthly retainer.
- Where we work
- All 50 states
- Reply
- Within one business day