Harry Monroe "Welch" Welchonce (November 20, 1883 – February 26, 1977) was an American Major League Baseball outfielder. Welchonce played for the Philadelphia Phillies in 1911. In 26 games, Welchonce had 14 hits in 66 at-bats, with a .212 batting average. He batted left and threw right-handed. In 1916, he was the player/manager of the Dallas Giants in the Texas League.
Welchonce was born in North Point, Pennsylvania and died in Arcadia, California.