Glenn Layendecker (born May 9, 1961) is a former professional tennis player from the United States.

His career wins included wins over Andre Agassi, Michael Chang, Yannick Noah, Aaron Krickstein, Anders Järryd, and Brad Gilbert in singles matches.

He also beaned John McEnroe in the temple with an approach shot at the US Open.

He was the tennis coach of the Oregon Episcopal School Aardvarks.

[1] Layendecker lives in San Mateo, California and worked for the West Coast Conference before retiring in 2023.