FMCSA · Safety Measurement System register

Iowa motor carriers

• 25,803Registered carriers
• 74,568Inspections on file
• 3,675Reportable crashes
• 92Fatal crashes
• 16,321Inspections with an out-of-service order
• 3,310Hazardous materials inspections
• 103Hazmat carriers
• 352Passenger carriers

The census registers 25,803 motor carriers in Iowa, 103 of them carrying hazardous materials and 352 of them carrying passengers. Inspections recorded against carriers here number 74,568, 16,321 of which ended in an out-of-service order, and 3,675 reportable crashes, 92 of them fatal, are on file.

By category

• Controlled Substances/Alcohol in IA
• Crash Indicator in IA
• Driver Fitness in IA
• Hazardous Materials Compliance in IA
• Hours-of-Service Compliance in IA
• Unsafe Driving in IA
• Vehicle Maintenance in IA

Carriers by fleet size in Iowa

• 1 power unit 13,594
• 2 to 5 power units 8,703
• 6 to 20 power units 2,156
• 21 to 100 power units 566
• 101 to 1,000 power units 106
• 1,000 or more power units 12

Carriers by the work they do

• Interstate 14,315
• Intrastate, hazardous materials 11,153
• Intrastate, non-hazardous 335

Towns the carriers are based in

Des Moines (970) · Cedar Rapids (528) · Davenport (425) · Sioux City (402) · Dubuque (371) · Waterloo (362) · Council Bluffs (296) · Ankeny (189) · Iowa City (180) · Urbandale (163) · West Des Moines (154) · Ottumwa (152) · Fort Dodge (150) · Marshalltown (142) · Carroll (141) · Decorah (137) · Marion (135) · Ames (132) · Cedar Falls (132) · Bettendorf (131) · Clinton (127) · Oskaloosa (122) · Rock Valley (122) · Mason City (120) · Muscatine (118)

Unsafe Driving is the category a broker is most often shown first. Every jurisdiction →

Figures from the federal source files: EPA’s ECHO downloads, CMS provider files and the FMCSA census.

Counts from FMCSA SMS input files on data.transportation.gov: kjg3-diqy (Motor Carrier Census, 2,122,441 rows), rbkj-cgst (Inspection, 5,834,148), 8mt8-2mdr (Violation, 6,808,260), 4wxs-vbns (Crash, 255,582), p2mt-9ige (Out of Service Orders, 399,600); SoQL aggregates fetched 2026-09-16. A category’s rank is the register’s own count for this jurisdiction set against the same count for the other jurisdictions on the desk, and the town names are the census’s own spelling.