At what time does the sun goes down in Dallas, Texas? You’ll find it here. Dallas is the county seat of Dallas County. Portions of the city extend into neighboring Collin, Denton, Kaufman, and Rockwall counties. See also the times of sunset and sunrise for Houston, the most populous city of Taxes, and Austin, the capital city of Texas. Want to know at what time it gets dark at your location? See our homepage.