What the title says, but changed up some. The 1980s had some very -- um -- interesting horror movies. This list ignores a lot of famous '80s horror movies, like The Shining, The Lost Boys, Child's Play and The Thing, for less well-known but very good movies, or movies that are so quintessentially '80s they would never have been made previous to the '80s. Some have a Spielberg feel, or stick their tongues firmly in their cheeks, or play with being sexy (rarely successfully), or try all those things at once. At least one is so over-the-top (Lifeforce) that it's entertaining in spite of being terrible.
So, not a "best" of the '80s (though a few are -- The Changeling and The Hidden for instance). But very '80s.