Dell Diamond is built on 85 acres (344,000 m²) of former farmland on the east side of Round Rock, Texas,[7] a rapidly growing suburban city northeast of Austin. Nolan Ryan and his son Reid Ryan, part owners of the Express, originally wanted a stadium inside the city of Austin, but found a more attractive site in the City of Round Rock, with support from the city leadership. The city of Round Rock contributed $7.35 million to the $25 million cost of the facility. The city owns the ballpark and gave the Express a 38-year lease. Dell Computer Corporation (now Dell, Inc.) contracted for naming rights in a deal that will cost the company $2.5 million over 15 years.
The stadium has also hosted several college games, including some early-season University of Texas contests in 2007 while the Longhorns' home field, UFCU Disch-Falk Field, had been undergoing a major renovation project. In a showcase neutral site game was played on February 21, 2012 between the Baylor Bears and Texas State Bobcats.[8] Dell Diamond is also the designated site for the University Interscholastic League state baseball tournament.