William Lorenz "Larry" Kopf (November 3, 1890 – October 15, 1986) was a professional baseball player who played infielder in the Major Leagues from 1913 to 1923.

He would play for the Cleveland Indians, Philadelphia Athletics, Boston Braves and Cincinnati Reds.

Best known for his part in the only double no hitter in major league history.

He was the brother of football coach Herb Kopf.

This biographical article relating to an American baseball infielder is a stub.