Constantia, located five miles south of Doyle came into existence when Henry Butters bought the Albert Ross Ranch, and gave his new acquisition its name. In 1898, Butters transformed the ranch into a small village—complete with a general store, Wells Fargo Office, dwellings for the employees and a Catholic Church.
The Constantia Post Office was late on arrival, it was not established until April 5, 1912, with August C. Drayeur, serving as first postmaster. In the 1920s, saw the introduction of the Rural Free Delivery, thus many of these rural post offices were closed. Constantia was a victim and it ceased to operate on June 30, 1927.