I just had a comment from a reader questioning the existence of Loco, Oklahoma. I happened to go through Loco on my little drive today and shot a couple of photos. The photo below is of the old Methodist Church building.
According to Oklahoma Place Names by George H. Shirk this is the information provided about Loco: "In southeastern Stephens County. Post office established June 3, 1890. Took its name from the locoweed, an herb of the pea family, usually poisonous to livestock" (143).