La Vernia is a city in Wilson County, Texas, United States. La Vernia is located is on the south bank of Cibolo Creek at the junction of U.S. Highway 87 and Texas Farm to Market Road 775, about twenty-five miles southeast of downtown San Antonio. The population was 1,034 in the 2010 census. and has an estimated population of 1,300 in 2015. La Vernia is part of the San Antonio Metropolitan Statistical Area.