San Angelo is a city in and the county seat of Tom Green County, Texas, United States. Its location is in the Concho Valley, a region of West Texas between the Permian Basin to the northwest, Chihuahuan Desert to the southwest, Osage Plains to the northeast, and Central Texas to the southeast. According to a 2014 Census estimate, San Angelo has a total population of 97,492. The city is the principal city and center of the San Angelo metropolitan area, which has a population of 118,182. San Angelo is home to Angelo State University, historic Fort Concho, and Goodfellow Air Force Base. Some common nicknames of San Angelo include Angelo, the River City, the Concho City, the Pearl of the Conchos, and the Oasis of West Texas.
San Angelo is located at 31°27′11″N 100°27′9″W (31.453113, −100.452502). According to the United States Census Bureau, the city has a total area of 58.2 square miles (150.9 km²), of which, 55.9 square miles (144.8 km²) of it is land and 2.3 square miles (6.1 km²) of it (4.03%) is covered by water.
San Angelo falls on the southwestern edge of the Edwards Plateau and the northeastern edge of the Chihuahuan Desert at the junction of the North and South Concho Rivers. The city has three lakes: Twin Buttes Reservoir, O.C. Fisher Reservoir, and Lake Nasworthy. The Middle Concho River joined the South Concho several miles upstream, but the confluence has been obscured by the Twin Buttes dam.