The 2004 RCA Championships was a men's tennis tournament played on outdoor hard courts. It was the 17th edition of the event known that year as the RCA Championships, and was part of the International Series of the 2004 ATP Tour. It took place at the Indianapolis Tennis Center in Indianapolis, Indiana, United States, from July 19 through July 26, 2004. It was the second event of the 2004 US Open series, after the Mercedes Benz Cup in Los Angeles. Andy Roddick won the singles title.
See main article: 2004 RCA Championships – Singles. 
Andy Roddick defeated Nicolas Kiefer, 6–2, 6–3
See main article: 2004 RCA Championships – Doubles. 
Jordan Kerr / Jim Thomas defeated Wayne Black / Kevin Ullyett 6–7(7–9), 7–6(7–3), 6–3