Tonkawa (YTB-786) was a United States Navy Natick-class large harbor tug named for Tonkawa, Oklahoma.

[1] The contract for Tonkawa was awarded 31 January 1964.

Placed in service in June 1966, Tonkawa was assigned to duty at Atlantic Area Advanced Bases, including Naval Station Rota Spain, and provided tug and tow services for the Atlantic Fleet.

Stricken from the Navy Directory in 1992, she was sold 6 October 2000 through the General Services Administration (GSA) to McAllister Towing and renamed Margaret McAllister.

This article about a specific ship or boat of the United States Armed Forces is a stub.