Reed Diamond (born July 20, 1967) is an American actor. He is best known for the role on Homicide: Life on the Street and Dollhouse. He also appeared on The Shield.

On the set of Scared Silent (2002), Reed met his wife, Marnie McPhail Diamond, and they have been happily married since 2004. Both Reed and Marnie are members of the rock band "Chuck Valiant," with McPhail as the lead singer and Diamond playing the guitar.