Bexar County was created on December 20, 1836, and encompassed almost the entire western portion of the Republic of Texas, including the disputed areas of western New Mexico northward to Wyoming. After statehood, 128 counties were carved out of its area.

The county gets its name from San Antonio de Béxar, one of the twenty-three municipalities of Texas at the time of its independence. San Antonio de Béxar—originally Villa of San Fernando de Béxar—was the first civil government established in the Spanish province of Texas. Specifically, the municipality was created in 1731 when fifty-five Canary Islanders settled near the system of missions that had been established around the source of the San Antonio River. The new settlement was named after the Presidio San Antonio de Béjar, the Spanish military outpost that protected the missions. The presidio, located at the San Pedro Springs, was founded in 1718 and named for Viceroy Balthasar Manuel de Zúñiga y Guzmán Sotomayor y Sarmiento, second son of the Duke of Béxar (a town in Spain).

The Balcones Escarpment bisects the county from west to northeast; to the north of the escarpment are the rocky hills, springs and canyons of the Texas Hill Country. South of the escarpment are Blackland Prairie and the South Texas plains. The San Antonio Riverrises from springs north of downtown San Antonio, and flows southward and southeastward through the county.

According to the U.S. Census Bureau, the county has a total area of 1,257 square miles (3,255.6 km²), of which 1,247 square miles (3,229.7 km²) is land and 10 square miles (25.9 km²) (0.78%) is water.

Bexar County is well known for its diversity and community built atmosphere. Homes and life styles range from busy inner city living in one of our nation's largest cities to peaceful rural living in our unique one of a kind Texas Hill Country. Entertainment and shopping is not only a major draw and favorite for thousands of tourist every year but also a highlight for residents and home owners alike.

Our County is also home to some of the most sought after and best performing school districts in the state of Texas, including NISD and NEISD.

Surrounding Counties include Comal, Kendall, Bandera, Medina, Guadalupe, Wilson and Atascosa.