Firms with offices in Illinois
Show firms headquartered in Illinois
| Firm | Rank | DI Index (?) | Size (?) | Headquarters | Revenue | Staff | Offices | Year |
|---|---|---|---|---|---|---|---|---|
| Adrian Smith + Gordon Gill Architecture | 76 | Chicago, IL | $28,500,000 | 110 | 1 | 2006 | ||
| AECOM (Architecture) | 2 | Los Angeles, CA | $687,520,000 | 4,399 | 400 | 1990 | ||
| ArchitectureIsFun | Chicago, IL | 6 | 1 | 1994 | ||||
| bKL Architecture LLC | Chicago, IL | 20 | 2 | 2010 | ||||
| Brininstool, Kerwin & Lynch | Chicago, IL | 20 | 1 | 2010 | ||||
| BSA LifeStructures | 47 | Indianapolis, IN | $45,326,151 | 247 | 3 | 1975 | ||
| Cannon Design | 9 | Grand Island, NY | $218,808,718 | 1,053 | 17 | 1945 | ||
| Chipman Design Architecture | Des Plaines, IL | 3 | 1986 | |||||
| Coffey, Daniel P. & Associates | 322 | Chicago, IL | $5,100,000 | 25 | 1 | 1984 | ||
| DeStefano Partners | Chicago, IL | 60 | 1988 | |||||
| Dewberry (Architecture) | 22 | Fairfax, VA | $106,284,000 | 1,800 | 40 | 1956 | ||
| DLR Group | 21 | Omaha, NE | $110,000,000 | 502 | 21 | 1966 | ||
| Epstein | 146 | Chicago, IL | $17,340,000 | 300 | 4 | 1921 | ||
| Fanning/Howey Associates | 68 | Celina, OH | $31,447,134 | 173 | 10 | 1961 | ||
| FGM Architects | Oak Brook, IL | 1945 | ||||||
| Gensler | 1 | San Francisco, CA | $764,081,273 | 3,500 | 34 | 1965 | ||
| GHAFARI | 50 | Dearborn, MI | $42,861,710 | 101 | 8 | 1982 | ||
| Goettsch Partners | 104 | Chicago, IL | $22,748,000 | 90 | 3 | 1938 | ||
| GreenbergFarrow | 83 | Atlanta, GA | $26,924,200 | 140 | 8 | 1974 | ||
| Harley Ellis Devereaux | 64 | Southfield, MI | $34,026,000 | 208 | 5 | 1908 | ||
| HDR Architecture | 6 | Omaha, NE | $330,600,000 | 1,500 | 43 | 1917 | ||
| HKS, Inc. | 8 | Dallas, TX | $225,000,000 | 940 | 18 | 1939 | ||
| HOK | 3 | St. Louis, MO | $447,472,000 | 1,695 | 25 | 1955 | ||
| Kirkegaard Associates | Chicago, IL | 22 | 2 | 1976 | ||||
| Legat Architects | 191 | Chicago, IL | $12,396,060 | 21 | 1964 | |||
| Loebl Schlossman & Hackl | 328 | Chicago, IL | $4,900,000 | 36 | 1925 | |||
| McKissack & McKissack | 109 | Washington, DC | $22,339,000 | 150 | 8 | 1990 | ||
| Mekus Tanager | Chicago, IL | 14 | 1984 | |||||
| Moody - Nolan | 121 | Columbus, OH | $20,414,280 | 21 | 7 | 1982 | ||
| Murphy/Jahn Architects | 77 | Chicago, IL | $28,197,900 | 80 | 1937 | |||
| Perkins + Will | 4 | Chicago, IL | $372,000,000 | 1,517 | 23 | 1935 | ||
| Perkins Eastman | 16 | New York, NY | $130,000,000 | 675 | 13 | 1981 | ||
| PositivEnergy Practice | Chicago, IL | 12 | 1 | 2010 | ||||
| Rafael Viñoly Architects | 26 | New York, NY | $84,966,000 | 510 | 1983 | |||
| RATIO Architects | 162 | Indianapolis, IN | $15,613,786 | 81 | 3 | 1982 | ||
| Risinger + Associates | Chicago, IL | 11 | 1 | 2005 | ||||
| RTKL Associates Inc. | 10 | Baltimore, MD | $201,933,000 | 900 | 10 | 1946 | ||
| Skidmore, Owings & Merrill | 7 | Chicago, IL | $252,500,000 | 788 | 10 | 1936 | ||
| SmithGroupJJR | 13 | Detroit, MI | $160,000,000 | 747 | 11 | 1853 | ||
| Solomon Cordwell Buenz | 93 | Chicago, IL | $24,730,953 | 120 | 3 | 1931 | ||
| SSOE Group | 17 | Toledo, OH | $126,535,500 | 858 | 23 | 1948 | ||
| Threshold Acoustics | Chicago, IL | 10 | 1 | 2006 | ||||
| tvsdesign | 60 | Atlanta, GA | $35,600,000 | 167 | 4 | 1968 | ||
| VOA Associates | 48 | Chicago, IL | $45,300,000 | 262 | 7 | 1969 | ||
| Wight & Company | 129 | Darien, IL | $19,509,540 | 105 | 2 | 1939 |
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