Top NAICS Codes in Illinois FY2025

Industries ranked by place-of-performance federal contract obligations in Illinois during fiscal year 2025.

Quick answer

NAICS 561612, SECURITY GUARDS AND PATROL SERVICES, leads Illinois in FY2025 with $31,420,749 in ingested obligations.

Market Snapshot

Ranked contractors49
Top obligations$31,420,749
RankNAICSNAICS industryObligationsAwards
1561612SECURITY GUARDS AND PATROL SERVICES$31,420,7491
2339999ALL OTHER MISCELLANEOUS MANUFACTURING$10,822,42339
3423850SERVICE ESTABLISHMENT EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS$9,618,2752
4334111ELECTRONIC COMPUTER MANUFACTURING$2,410,9512
5541519OTHER COMPUTER RELATED SERVICES$1,659,5204
6423610ELECTRICAL APPARATUS AND EQUIPMENT, WIRING SUPPLIES, AND RELATED EQUIPMENT MERCHANT WHOLESALERS$1,454,15115
7541611ADMINISTRATIVE MANAGEMENT AND GENERAL MANAGEMENT CONSULTING SERVICES$1,437,1491
8334516ANALYTICAL LABORATORY INSTRUMENT MANUFACTURING$1,184,0481
9336413OTHER AIRCRAFT PARTS AND AUXILIARY EQUIPMENT MANUFACTURING$917,3897
10221122ELECTRIC POWER DISTRIBUTION$796,0002
11332992SMALL ARMS AMMUNITION MANUFACTURING$720,0351
12562910REMEDIATION SERVICES$597,4511
13622110GENERAL MEDICAL AND SURGICAL HOSPITALS$556,0003
14423450MEDICAL, DENTAL, AND HOSPITAL EQUIPMENT AND SUPPLIES MERCHANT WHOLESALERS$539,468391
15541990ALL OTHER PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES$377,3252
16325411MEDICINAL AND BOTANICAL MANUFACTURING$332,69339
17333999ALL OTHER MISCELLANEOUS GENERAL PURPOSE MACHINERY MANUFACTURING$290,5704
18334412BARE PRINTED CIRCUIT BOARD MANUFACTURING$243,7731
19621420OUTPATIENT MENTAL HEALTH AND SUBSTANCE ABUSE CENTERS$208,5001
20811111GENERAL AUTOMOTIVE REPAIR$170,0726
21332410POWER BOILER AND HEAT EXCHANGER MANUFACTURING$164,8001
22561210FACILITIES SUPPORT SERVICES$150,0001
23333120CONSTRUCTION MACHINERY MANUFACTURING$135,4231
24484210USED HOUSEHOLD AND OFFICE GOODS MOVING$118,6502
25238910SITE PREPARATION CONTRACTORS$77,6902
26513210SOFTWARE PUBLISHERS$60,0001
27541199ALL OTHER LEGAL SERVICES$56,0601
28334513INSTRUMENTS AND RELATED PRODUCTS MANUFACTURING FOR MEASURING, DISPLAYING, AND CONTROLLING INDUSTRIAL PROCESS VARIABLES$49,2151
29325413IN-VITRO DIAGNOSTIC SUBSTANCE MANUFACTURING$42,4791
30333912AIR AND GAS COMPRESSOR MANUFACTURING$41,9761
31562111SOLID WASTE COLLECTION$22,2682
32423310LUMBER, PLYWOOD, MILLWORK, AND WOOD PANEL MERCHANT WHOLESALERS$20,4041
33336214TRAVEL TRAILER AND CAMPER MANUFACTURING$17,0761
34335311POWER, DISTRIBUTION, AND SPECIALTY TRANSFORMER MANUFACTURING$17,0692
35541380TESTING LABORATORIES AND SERVICES$16,3161
36334519OTHER MEASURING AND CONTROLLING DEVICE MANUFACTURING$11,0153
37561611INVESTIGATION AND PERSONAL BACKGROUND CHECK SERVICES$8,6001
38424210DRUGS AND DRUGGISTS' SUNDRIES MERCHANT WHOLESALERS$8,2562
39339112SURGICAL AND MEDICAL INSTRUMENT MANUFACTURING$7,9032
40332919OTHER METAL VALVE AND PIPE FITTING MANUFACTURING$7,6661
41541513COMPUTER FACILITIES MANAGEMENT SERVICES$5,0191
42325412PHARMACEUTICAL PREPARATION MANUFACTURING$3,03212
43221210NATURAL GAS DISTRIBUTION$3,0001
44926130REGULATION AND ADMINISTRATION OF COMMUNICATIONS, ELECTRIC, GAS, AND OTHER UTILITIES$2,8002
45332111IRON AND STEEL FORGING$2,0491
46311812COMMERCIAL BAKERIES$1,6552
47531120LESSORS OF NONRESIDENTIAL BUILDINGS (EXCEPT MINIWAREHOUSES)$8601
48561621SECURITY SYSTEMS SERVICES (EXCEPT LOCKSMITHS)$7491
49332510HARDWARE MANUFACTURING$4662

Source: USAspending.gov. Last updated from ingested federal spending data: May 7, 2026.