Schertz is the largest city in Guadalupe County, Texas, United States. Portions of the city are also located in Bexar and Comal counties. As of the 2000 census, the city population was 18,694; Today, the population exceeds 34,000. It is part of the larger San Antonio metropolitan area. Schertz apartments for rent comparison page shows most up to date rent information on Schertz apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.