Custer City, OK

ZIP code 73639 serves Hydro, a small community in Custer County, western Oklahoma, near Interstate 40 and the historic Route 66 corridor. Its best-known landmark is Lucille’s Service Station, a preserved Route 66 stop listed on the National Register of Historic Places and associated with longtime operator Lucille Hamons. The surrounding area is largely rural, with farms and open plains around Hydro’s compact residential and commercial center.