Osmium is the debut album of American funk band Parliament, led by George Clinton.

Since its re-release in 1990, Osmium has been distributed numerous times by various labels in the U.S., Europe and Japan, sometimes under alternate titles that have included Rhenium and First Thangs.

A number of these reissues have featured material that was not included on the original album, such as unreleased tracks and singles that were recorded around the same time as Osmium.

Garry Shider (guitar), Bernie Worrell (keyboards), and Tyrone Lampkin (drums) also appeared on some non-album tracks that were included in later CD reissues of the album.

Red Hot Mama, Loose Booty, I Call My Baby Pussycat, and Fantasy Is Reality would all be remade on later Parliament-Funkadelic albums.