Nightclub 9:30 (originally known and still commonly referred to as the 9:30 Club) is a nightclub and concert venue in Washington, D.C.. The club originally opened in 1980 at 930 F St. NW in downtown Washington (hence the name). Co-owned by Rich Heinecke and Seth Hurwitz, it later moved to its current location at 815 V Street NW, anchoring the eastern end of the U Street Corridor.

The 9:30 Club is served by the U Street station of the Washington Metro. The club has a capacity of 1200 people and is a standing-only venue. It won the Top Club awards at the 2007 through 2011 Billboard Touring Awards, except in 2008, when the award was not presented.

Nightclub 9:30 has been awarded "Nightclub of the Year" honors four times by Pollstar, the concert industry trade journal. And for most of that time, it has also been Pollstar's top ticket-selling club. In 2004, the 9:30 sold 236,112 tickets.

Rolling Stone Magazine online rated the club the #1 Big Room in America. Fall Out Boy's Patrick Stump said, "It's got so much character, you wonder if the locals know how lucky they are."