Post Mills is a village in Orange County, of the Woodstock-Quechee region, and is home to Vermontasaurus, a 25-foot-tall, 122-foot-long folk art representation of a dinosaur at the Post Mills Airport in the town of Thetford, Vermont.

While the name of the village changed from "Post Mills Village" to "Post Mills" and back again, more than once, the origin of the name is clear. Eldad Post built the first gristmill and sawmill there very early in the town's settlement, and in 1782 he sold the mills to his sons, Aaron and Israel. During the next hundred years the village became a busy manufacturing community, with a linseed oil mill, fulling mills, a fishing rod factory, a furniture making shop and a blacksmith shop.