Where was the Silent Night, Deadly Night film series filmed?

The Silent Night, Deadly Night film series has 5 titles (1984 to 2012), filmed at 1 place in 1 country. Wikipedia names 7 more. Every place links to its source.

The productions, in order

Every filming location they used

Each place appears once, even when several titles were filmed there.

Named in Wikipedia's own articles

Places named only in the titles’ Wikipedia articles.