Greg Errico (born September 1, 1948, San Francisco, California) is an American musician and record producer, best known for being the drummer for the popular and influential psychedelic soul/funk band, Sly and the Family Stone. Errico was the original drummer for the band, and the first to quit it in 1971 because of the band's continuing turmoil.
Errico toured with jazz-fusion group Weather Report in 1973, but never recorded with the group. His playing can be heard on tapes hosted at Wolfgang's Vault. Joe Zawinul said that no one could play his tune "Boogie Woogie Waltz" better than Errico had.
Errico joined the David Bowie band for his Diamond Dogs 1974 tour of the U.S. during September 1974.
Errico later collaborated with bands such as Santana, and the Grateful Dead. In the early 1980s, he was the drummer of the Jerry Garcia Band. He also worked with Larry Graham from Sly & The Family Stone, plus members of the Tower of Power horns, Journey and the Pointer Sisters on an album for Betty Davis.