A post office called Cornish was established in 1914, and remained in operation until 1967.[2] The community was named after a Mr. Cornish, an engineer employed by the Union Pacific Railroad.[3]
A railway was built through Cornish sometime in the early 1900s, as part of a line from Greeley to Briggsdale.[4] The Union Pacific Railroad filed for the abandonment of the line in 1942, with the actual abandonment occurring in 1946.