William H. Kinsler (November 9, 1867 – August 10, 1963) was an American professional baseball player who played outfield in the Major Leagues for New York Giants of the National League.

He appeared in one game, on June 8, 1893.

The following season he played for the Nashville Tigers in the Southern Association.

At the time of his death, he was the oldest living former major league player.

This biographical article relating to an American baseball outfielder born in the 1860s is a stub.