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Exhibit No. 21

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
Smith Transport, LLC			Subsidiary			PA
Soluciones Internationales de Transporte, S.A. DE C.V.			Subsidiary			MX
CFI Mex, S. de R.L. de C.V.;			Subsidiary			MX
CFI Logistica, S.A, de C.V.			Subsidiary			MX

Pursuant to Item 601(b)(21)(ii) of Regulation S-K, the names of certain other subsidiaries of Heartland Express, Inc. are omitted. These subsidiaries, considered in the aggregate, would not constitute a "significant subsidiary" under SEC rules.