2100 Ross Avenue, Postmodern skyscraper in City Center District, Dallas, US

2100 Ross Avenue is a postmodern skyscraper with 33 floors of glass and steel in Dallas's City Center District. The building contains office space and underwent extensive interior modernization to meet current needs.

The tower was renamed 2100 Ross Avenue after Cousins Properties bought it for US$59 million in 2012 and finished a lobby, technology and security renovation in 2014. Thomas Dundon acquired it in 2015 for Dundon Capital Partners and sold it in 2019 after the Alliance of American Football closed. Thompson Coburn moved in during 2020.

The San Jacinto Tower appeared in establishing shots for the Oil Barons Club, a fictional location in Season 7 of the original Dallas television series. The building's exterior stood in for the club on screen, linking the tower to the long-running show about the Texas oil industry.

The tower occupies the block fronting both 2100 Ross Avenue and 2121 San Jacinto Street in the City Center District of downtown Dallas. Its 844,000 square feet are given over to office space, so the lobby and upper floors serve tenants and their guests rather than the general public. The 2013–2014 renovation added lobby improvements, high-tech installations and security upgrades.

The tower's top floor stood in for the fictional Oil Barons Club in season 7 of the original Dallas television series, filmed as establishing shots. The building was renamed 2100 Ross Avenue after shedding its original San Jacinto Tower name.