Hackberry, KansasHackberry is a former country post office located along Hackberry Creek in Gove Township, Gove [County, Kansas|Gove Township], Gove County, Kansas, United States.HistoryThe Hackberry Mills, Wallace County, Kansas post office issued in 1879 was moved to Hackberry in 1881. The post office was discontinued in 1888, then reissued from 1898 to 1931.