Clifford Douglas Blankenship (April 10, 1880 – April 26, 1956) was an American professional baseball player. He played his first game on April 17, 1905. He played his 95th and final game on August 18, 1909. His batting average was .225.

Cliff Blankenship
Catcher/First baseman
Born: (1880-04-10)April 10, 1880 Columbus, Georgia
Died: April 26, 1956(1956-04-26) (aged 76) Oakland, California
Batted: Right Threw: Right
MLB debut
April 17, 1905, for the Cincinnati Reds
Last MLB appearance
August 18, 1909, for the Washington Senators
MLB statistics
Fielding percentage	.952
Putouts	344
Batting average	.225
Teams
Cincinnati Reds (1905) Washington Senators (1907, 1909)

In 1907, Senators manager Joe Cantillon sent Blankenship to Weiser, Idaho, to scout pitcher Walter Johnson. Blankenship successfully persuaded Johnson to accept a Washington contract.