The Cornish, Colorado, post office operated from November 24, 1914, until March 31, 1967. The
Gill, Colorado, post office (
ZIP code 80624) now serves the area. A railway was built through Cornish sometime in the early 1900s, as part of a line from
Greeley to
Briggsdale. The Union Pacific Railroad filed for the abandonment of the line in 1942, with the actual abandonment occurring in 1946. ==Geography==