how would you classify zombie movies

I think their main genres would be horror or sci-fi, but obviously there is plenty of sub-genres. but yeah, sci-fi or horror as far as i know

The Zombie film really is a genre all of its own in all honesty, and though there are sci fi zombie films out there, the genre itself is more of a horror genre than that of sci fi.

Well I think they can be classed as sci-fi. After all a zombie outbreak is usually the result of some science (or nature) gone amok in a future world. Or some 'contagion' from Space? I see them as kind of a sci-fi-horror hybrid. I know it's a TV show, but The Walking Dead is the latest & best incarnation (IMHO) of Zombiedom & has totally raised the bar!

@I totally agree with you. There always seem some secretive science project gone wrong. The walking dead is awesome. I hear that the are nearly finished film the 4th season, can't wait to see it.

All zombie movies with an outbreak are Sci-fi. The only other alternative really is the "dead walking the earth" which is supernatural and I would consider those horror movies.