San Antonio is an unincorporated community in Socorro County, New Mexico, United States, roughly in the center of the state, on the Rio Grande. The entire population of the county is around 18,000.San Antonio is partly agricultural, and partly a bedroom community for Socorro and White Sands Missile Range.The city supports a few small businesses, which include the original Owl Bar and Cafe, Manny's Buckhorn Tavern, San Antonio Crane, a restaurant featuring Mexican food, a seasonal roadside market, and a general store.San Antonio is the gateway to the Bosque del Apache National Wildlife Refuge. Interstate 25 runs along the west, and U.S. Route 380 begins there and heads east to Carrizozo. The Rio Grande is just to the east of San Antonio, and the BNSF Railway runs through it and has a small yard, little more than a siding.While still part of the New Mexico Territory, the town was the birthplace of Conrad Hilton.