Central Texas in the context of "Killeen, Texas"

31°52′N 94°55′W / 31.867°N 94.917°W / 31.867; -94.917

East Texas is a broadly defined cultural, geographic, and ecological region in the eastern part of the U.S. state of Texas that consists of approximately 38 counties. It is roughly divided into Northeast, Southeast, and Deep East Texas. Most of the region consists of the Piney Woods ecoregion. East Texas can sometimes be defined only as the Piney Woods. At the fringes, towards Central Texas, the forests expand outward toward sparser trees and eventually into open plains.

West Texas is a loosely defined region in the U.S. state of Texas, generally encompassing the arid and semiarid lands west of a line drawn between the cities of Wichita Falls, Abilene, and Del Rio.

No consensus exists on the boundary between East Texas and West Texas. While most Texans understand these terms, no boundaries are officially recognized and any two people are likely to describe the boundaries of these regions differently. The historian and geographer Walter Prescott Webb has suggested that the 98th meridian separates East and West Texas; writer A.C. Greene proposed that West Texas extends west of the Brazos River. Use of a single line, though, seems to preclude the use of other separators, such as an area—Central Texas. Texas is part of the South and the American Southwest at the same time, while the semiarid and desert climates of West Texas are clearly characteristic of the Southwest.

San Antonio (/ˌsæn ænˈtoʊnioʊ/ SAN an-TOH-nee-oh; Spanish for "Saint Anthony") is a city in the U.S. state of Texas. It is the seventh-most populous city in the United States, second-most populous city in Texas and second-most populous city in the Southern U.S., with a population of 1.43 million at the 2020 census. The San Antonio metropolitan area, with an estimated 2.76 million residents, ranks as the third-largest metropolitan area in Texas and the 24th-largest in the nation. It is the county seat of Bexar County.

Founded in 1718 as a Spanish mission and colonial outpost, San Antonio became the first chartered civil settlement in present-day Texas in 1731. The city was named in 1691 by a Spanish expedition in honor of Saint Anthony of Padua. It was part of the Spanish Empire, then the Mexican Republic from 1821 to 1836, before joining the United States. Straddling the regional divide between South and Central Texas, San Antonio anchors the southwestern corner of an urban megaregion colloquially known as the Texas Triangle. It lies about 80 miles (130 km) from Austin along the I-35 corridor, and together the San Antonio–Austin metroplex is home to approximately 5 million people.

Comanche County is a county located on the Edwards Plateau in Central Texas. As of the 2020 census, its population was 13,594. The county seat is Comanche. The county was founded in 1856 and is named for the Comanche Native American tribe.

Austin (/ˈɔːstɪn/ AW-stin) is the capital city of the U.S. state of Texas. With a population of 961,855 at the 2020 census, it is the 13th-most populous city in the U.S., fifth-most populous city in Texas, and second-most populous U.S. state capital (after Phoenix, Arizona), while the Austin metro area with an estimated 2.55 million residents is the 25th-largest metropolitan area in the nation. Austin is the county seat and most populous city of Travis County, with portions extending into Hays and Williamson counties. Incorporated on December 27, 1839, it has been one of the fastest-growing large cities in the United States since 2010.

Located in Central Texas within the greater Texas Hill Country, it is home to numerous lakes, rivers, and waterways, including Lady Bird Lake and Lake Travis on the Colorado River, Barton Springs, McKinney Falls, and Lake Walter E. Long. Evidence of human activity in the region is estimated to date back at least 11,200 years ago, with early habitation by Clovis peoples and later by American Indian groups such as the Tonkawa. Austin and San Antonio are approximately 80 miles (129 km) apart, and both fall along the I-35 corridor. This combined metropolitan region of San Antonio–Austin has approximately 5 million people. Austin is the southernmost state capital in the contiguous United States and is considered a Gamma + level global city as categorized by the Globalization and World Cities Research Network.

The Austin–Round Rock–San Marcos metropolitan statistical area, or Greater Austin, is a five-county metropolitan area in the U.S. state of Texas, as defined by the Office of Management and Budget. The metropolitan area is situated in Central Texas on the western edge of the American South and on the eastern edge of the American Southwest, and borders Greater San Antonio to the south. It forms part of the larger San Antonio-Austin Metroplex.

As of the 2020 U.S. census, the Austin–Round Rock–San Marcos MSA is the 26th-largest metropolitan area in the United States, with a total population of 2,352,426. The metropolitan area contains the city of Austin—the fourth-largest city in Texas and the 10th-largest city in the United States with a population of 974,447 people. Austin's largest suburbs are Round Rock, Cedar Park, Georgetown, San Marcos, Leander, and Pflugerville.

Greater San Antonio, officially designated San Antonio–New Braunfels, is an eight-county metropolitan area in the U.S. state of Texas defined by the Office of Management and Budget (OMB). The metropolitan area straddles South Texas and Central Texas and is on the southwestern corner of the Texas Triangle. The official 2020 U.S. census showed the metropolitan area's population at 2,558,143—up from a reported 1,711,103 in 2000—making it the 24th largest metropolitan area in the United States. Downtown Austin and Downtown San Antonio are approximately 80 miles (129 km) apart, and both fall along the Interstate 35 corridor. This combined metropolitan region of San Antonio–Austin has approximately 5.1 million people.

San Antonio–New Braunfels is the third-largest metro area in Texas, after Dallas–Fort Worth–Arlington and Houston–The Woodlands–Sugar Land.

The Texas Hill Country is a geographic region of Central and South Texas, forming the southeast part of the Edwards Plateau. Given its location, climate, terrain, and vegetation, the Hill Country can be considered one of the borders between the American South and Southwest. The region represents the very remote rural countryside of Central Texas, but also is home to growing suburban neighborhoods and affluent retirement developments.

The region is notable for its karst topography and tall rugged hills of limestone or granite. Many of the hills rise to a height of 400–500 ft (120–150 m) above the surrounding plains and valleys, with Packsaddle Mountain rising to a height of 800 ft (240 m) above the Llano River in Kingsland. The Hill Country also includes the Llano Uplift and the second-largest granite dome in the United States, Enchanted Rock. The terrain throughout the region is characterized by a thin layer of topsoil and many exposed rocks and boulders, making the region very dry and prone to flash flooding. Native vegetation in the region includes various yucca, prickly pear cactus, desert spoon, and wildflowers in the Llano Uplift. The predominant trees in the region are Ashe juniper and Texas live oak.

The term Cross Timbers, also known as Ecoregion 29, Central Oklahoma/Texas Plains, is used to describe a strip of land in the United States that runs from southeastern Kansas across Central Oklahoma to Central Texas. Made up of a mix of prairie, savanna, and woodland, it forms part of the boundary between the more heavily forested eastern country and the almost treeless Great Plains, and also marks the western habitat limit of many mammals and insects.

No major metropolitan areas lie wholly within the Cross Timbers, although roughly the western half of the Dallas-Fort Worth Metroplex does, including the cities of Fort Worth, Denton, Arlington, and Weatherford. The western suburbs of the Tulsa metropolitan area and the northeastern suburbs of the Oklahoma City metropolitan area also lie within this area. The main highways that cross the region are I-35 and I-35W going north to south (although they tend to skirt the Cross Timbers' eastern fringe south of Fort Worth), and both I-40 and I-44 going east to west. Numerous U.S. Highways also cross the area. I-35 means a portion of Austin and Travis County is also included in the Cross Timbers.