William Abner Stanfill (January 16, 1892 – June 12, 1971) was briefly a member of the United States Senate from Kentucky.

Stanfill attended Union College and received a law degree from the University of Kentucky in 1912.

United States Senator Happy Chandler, a Democrat, resigned his Senate seat to become Commissioner of Baseball on November 1, 1945.

He served from November 19, 1945, to November 5, 1946, when his successor, John Sherman Cooper who had won the seat by election, assumed the Senate seat.

Stanfill then resumed the practice of law and later retired to Lexington, Kentucky.