Rex Marion Whitton (August 7, 1898 – July 7, 1981) was an American administrator.

At his retirement, he had completed more than 46 years of continuous highway work, 40 of which were spent in his native Missouri.

During his tenure as Federal Highway Administrator, the Bureau of Public Roads was reorganized to increase operational efficiency and instill new confidence.

He was also resident of the American Association of State Highway Officials (AASHO), now the American Association of State Highway and Transportation Officials (AASHTO).

This article incorporates public domain material from REX MARION WHITTON.