Harry Elbert "Deerfoot" Bay (January 17, 1878 – March 19, 1952) was a professional baseball player who played outfield in the Major Leagues from 1901 to 1908. Bay played for the Cincinnati Reds and Cleveland Bronchos/Naps.

He attended Peoria High School, winning medals in the 1896 and 1897 Illinois High School Association state track and field meets. After retiring from baseball in 1908, he returned to Peoria, became a bandleader at the local Apollo Theater, and toured the vaudeville circuit with Guy Kibbee. He later worked for the Peoria fire department and the Illinois Secretary of State.