The original Weston family homestead is now owned by the government, which operates it as a group home.

According to county administrator Jack Searles, the name was likely either Weston's Mills or Westons Mills at first (the 1869 Beers Atlas uses the name "Westonville" for the location), then changed to Weston Mills at the behest of President Benjamin Harrison, who sought to standardize post-office names by removing unnecessary possessive forms (see United States Board on Geographic Names).

The "s" was slowly, and colloquially, restored over the course of the 1960s, after a retail store opened using the "Weston's" name.

New York State Route 417 passes through the community, leading west 2 miles (3 km) into the center of Olean and southeast 3 miles (5 km) to the village of Portville.

24.6% of all households were made up of individuals, and 10.1% had someone living alone who was 65 years of age or older.