| Upshur County Texas Cities/Towns - Bettie, Big Sandy, Diana, East Mountain, Gilmer (County Seat), Ore City, Union Grove |
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![]() Your Ad Here Upshur County is a county located in the U.S. state of Texas. As of 2000, the population was 35,291. The county seat is Gilmer. History The county is named for Abel P. Upshur who was U.S. Secretary of State during President John Tyler's administration. Upshur was killed in the explosion on the USS Princeton along with new United States Secretary of the Navy Thomas Walker Gilmer. ![]() |