- Houston is a city in the state of Texas, United States. It is the fourth-largest city in the country and the most populous city in the state. Houston is known for its diverse population, vibrant economy, and cultural attractions. The city is home to numerous industries, including energy, healthcare, aerospace, and technology. Houston's economy is also heavily influenced by the Port of Houston, which is one of the busiest ports in the country. The city offers a wide range of recreational activities, including parks, museums, and theaters. Additionally, Houston is famous for its food scene, particularly its Tex-Mex and barbecue cuisine.