| Subsidiaries of the Registrant | ||
| State of Incorporation | ||||||||
| Heartland Express, Inc. | Parent | NV | ||||||
| Heartland Express, Inc. of Iowa | Subsidiary | IA | ||||||
| Heartland Express Maintenance Services, Inc. | Subsidiary | NV | ||||||
| Heartland Express Services, Inc. | Subsidiary | NV | ||||||
| Midwest Holding Group, LLC | Subsidiary | WI | ||||||
| Millis Transfer, LLC | Subsidiary | WI | ||||||