County created 3/13/1874 from Bexar County and named for Confederate Brigadier General Thomas Green. Because of the omission of a northern boundary, it included the land of sixty-six modern counties. organized 1/5/1875 with Ben Ficklin as the County Seat. After Ben Ficklin flooded 8/1882, the County Seat was moved to San Angelo. On 8/21/1876, the northern boundary was drawn from the northwest corner of Runnels County west to New Mexico, cutting off 54 counties to the north. The remaining county still included the area of the modern Coke, Crane, Ector, Glasscock, Irion, Loving, Midland, Reagan, Sterling, Upton and Ward Counties. -Handbook of Texas Online: Tom Green County