George Albert Hildebrand (September 6, 1878 – May 30, 1960) was an American professional baseball player and umpire.

Born in San Francisco, California, Hildebrand began his playing career in 1898.

He was playing for Providence in the Eastern League in the spring of 1902 when he discovered the effect moisture had on a pitched ball; he encouraged pitchers Frank Corridon and Elmer Stricklett to try the technique, and Stricklett was believed to be the first to use the pitch in a major league game in 1904.

[1] Hildebrand was behind the plate on June 21, 1916, when Rube Foster of the Boston Red Sox pitched a 2–0 no-hitter against the New York Yankees.

[2] He was also behind the plate on July 10, 1932 when Johnny Burnett of the Cleveland Indians collected a record nine hits in an 18-inning game against the Philadelphia Athletics.