I've come up with a list of Native American-themed horror movies. Most seem to be late 70s - early 80s. Can you think of more?
Shadow of the Hawk (1976)
The Manitou (1978)
Nightwing (1979)
The Prophecy (1979)
Wolfen (1981)
Scalps (1983)
One episode of Creepshow 2 (1987) was about a cigar-store Indian who comes to life.
Poltergeist. In that the horrors happening in the movie was caused by the house beeing buildt on a native burying ground.
shareMight be a stretch, but always happy to plug:
Ravenous (1999) dips in to some Ojibwa mythology
Adding a few not without redeeming qualities, but below my usual recommendation threshold, but let's face it, this subgenre has a pretty high chaff/wheat ratio:
Monsterwolf (2010)
The Dark Power (1985)
Man-Thing (2005)
Werewolf (1995) - the MST3K version is top-notch and a great first taste if not familiar
Natas: The Reflection (1983, though usually credited as a 1986 production)
shareThought I'd mention a few movies I don't see mentioned here, in case you were still curious.
Demon Warrior (1988)
Unearthed (2007) has a couple elements