Their 16 Greatest Hits is the third compilation album by the American rock band the Grass Roots.

It was originally released by Dunhill Records in September 1971[1] shortly after the success of "Sooner or Later" earlier that year (see 1971 in music).

The one song not on either previous album was "Sooner or Later," which had become the band's first Billboard top 10 entry since "Midnight Confessions" in 1968 and would be their last.

The front and back cover photographs were taken by Tom Gundelfinger and the package was designed by Philip Schwartz.

[2] The same artwork and design was used on the versions of the album released by MCA Records in 1980, with only the label differing.