Reunion Tower is a 561 ft (171 m) observation tower in Dallas, Texas, United States and one of the city's most recognizable landmarks. The tower is located at 300 Reunion Boulevard in the Reunion district of downtown Dallas, which is named after the mid-nineteenth century commune La Reunion. A free-standing structure until the construction of an addition to the Hyatt Regency Dallas and surrounding complex in 1998, the tower is the city's 15th tallest occupiable structure. It was designed by architectural firm Welton Becket & Associates.

Dallas is a city in the U.S. state of Texas and the most populous city in the Dallas–Fort Worth metroplex, the most populous metropolitan area in Texas and the fourth-most populous metropolitan area in the United States at 7.5 million people. It is the most populous city in and seat of Dallas County with portions extending into Collin, Denton, Kaufman, and Rockwall counties. With a 2020 census population of 1,304,379, it is the ninth-most populous city in the U.S. and the third-most populous city in Texas after Houston and San Antonio. Located in the North Texas region, the city of Dallas is the main core of the largest metropolitan area in the Southern United States and the largest inland metropolitan area in the U.S. that lacks any navigable link to the sea.