The city in the Southwest United States known as the "City of the Sun" is El Paso.

El Paso, Texas, earned the nickname "City of the Sun" due to its abundant sunshine, boasting over 300 sunny days annually. Located on the border with Mexico, El Paso offers a rich blend of cultures, history, and natural beauty. The city is surrounded by the stunning Franklin Mountains, providing opportunities for outdoor activities like hiking and biking. El Paso is also famous for its vibrant festivals, historic missions, and a thriving culinary scene influenced by Tex-Mex and traditional Mexican cuisine. Its sunny climate and diverse attractions make it a unique destination in the Southwest.