W. T. Waggoner Building, Office building in downtown Fort Worth, United States

The W. T. Waggoner Building is an office building in downtown Fort Worth that rises 20 stories with a white brick facade and terra cotta detailing. The upper floors feature a U-shaped design with an arch spanning between the 18th and 19th stories.

Built in 1919–1920 for William Thomas Waggoner, owner of the Waggoner Ranch and Waggoner Refinery, the tower was designed by Sanguinet & Staats at a cost of US$1,500,000. Continental National Bank kept offices there from 1920 to 1957. It joined the National Register of Historic Places on July 10, 1979.

The building's name recalls William Thomas Waggoner, owner of the Waggoner Ranch and Waggoner Refinery, who commissioned it in 1919. From 1920 to 1957 Continental National Bank kept offices inside, tying the tower to Fort Worth's financial life. It has been on the National Register of Historic Places since July 10, 1979.

The building was converted into the Sandman Signature Hotel in 2023 and now houses 240 rooms and meeting spaces in downtown. Visitors can stay at the hotel or view the building's architectural features from the street.

A natural gas explosion extensively damaged the hotel at about 3:30 PM CST on Monday, January 8, 2024, injuring 21 people. The building had opened as a Sandman Signature Hotel only in April 2023, after a 2018 remodel that kept the facade and profile while renewing the elevators, fire alarm, sprinklers, HVAC and electrical systems.