1. Coastal Plain: This region stretches along the Gulf of Mexico and includes the cities of Houston, Galveston, and Corpus Christi. It is characterized by flat, low-lying land, sandy beaches, and wetlands.

2. Central Texas: This region is known for its rolling hills, limestone cliffs, and the Edwards Plateau. It includes cities like Austin, San Antonio, and Waco.

3. Great Plains: This region extends westward from Central Texas and is characterized by flat, grassy plains. It includes the cities of Amarillo, Lubbock, and Abilene.

4. Trans-Pecos: This region is the westernmost part of Texas and is known for its rugged mountains, deserts, and canyons. It includes the city of El Paso.