A holster is a device used to hold or restrict the undesired movement of a handgun.

Holster may also refer to:

Police duty belt, a belt used to carrying law enforcement equipment A type of mobile phone case

Music Holster, a French hip hop duo formed by Sultan and Ibrahim "Strike (Holster)", a 2023 song by Lil Yachty

People Fredrik Holster (born 1988), Swedish footballer Marco Holster (born 1971), Dutch footballer Arlette Holsters, (born 1961), Belgian equestrian