The 2006 Legg Mason Tenis Classic was the 37th edition of this men's tennis tournament and was played on outdoor hard courts. The tournament was part of the International Series of the 2006 ATP Tour. It was held at the William H.G. FitzGerald Tennis Center in Washington, D.C. from July 31 through August 6, 2006.
Arnaud Clément defeated Andy Murray, 7–6(7–3), 6–2
- It was Clément's 2nd title of the year and the 4th of his career.
Bob Bryan / Mike Bryan defeated Paul Hanley / Kevin Ullyett, 6–3, 5–7, [10–3]