2011 U.S. Open Cup
The 2011 Lamar Hunt U.S. Open Cup was the 98th edition of the USSF's annual national soccer championship, running from June through early October. Seattle Sounders FC, who entered the competition as the two-time defending champions, successfully defended their title again. They became the third team in U.S. Open Cup history to win three straight U.S. Open Cups. As winner of the Open Cup, the Sounders earned a place in the 2012–13 CONCACAF Champions League Group stage. The farthest advancing USL Pro team was the Richmond Kickers.
Like the previous edition, the Open Cup featured 40 clubs from across the five tiers of the American soccer pyramid. This season, due to late provisional sanctioning, the North American Soccer League was not allowed to send its clubs to the tournament. The event featured eight clubs from Major League Soccer, with six automatically qualifying based on their league position in the 2010 season and two qualifying through a play-in tournament. They entered the tournament in the third round. All 11 USL Pro League clubs based in the United States, nine clubs from the USL Premier Development League, four clubs from the National Premier Soccer League, and eight United States Adult Soccer Association qualifiers began play in the first round.
Participating teams
The tournament consisted of 40 teams, according to the following distribution:;Major League Soccer
- Chicago Fire
- Columbus Crew
- FC Dallas
- Los Angeles Galaxy
- New York Red Bulls
- Real Salt Lake
- Seattle Sounders FC
- Sporting Kansas City
- On February 17, 2011, the USSF announced that no NASL teams will be participating in the competition since the league did not obtain provisional sanctioning in time.
- Charleston Battery
- Charlotte Eagles
- Dayton Dutch Lions
- Harrisburg City Islanders
- Los Angeles Blues
- F.C. New York
- Orlando City
- Pittsburgh Riverhounds
- Richmond Kickers
- Rochester Rhinos
- Wilmington Hammerheads
- Carolina Dynamo
- Central Florida Kraze
- Chicago Fire Premier
- Chivas El Paso Patriots
- Kitsap Pumas
- Reading United
- Real Colorado Foxes
- Ventura County Fusion
- Western Mass Pioneers
;USASA
- A.A.C. Eagles
- Doxa Italia
- DV8 Defenders
- Iowa Menace
- ASC New Stars
- New York Pancyprian-Freedoms
- Phoenix SC
- Regals FC
Open Cup Bracket
''Home teams listed on top of bracket. : After Extra Time''Schedule
Note: Scorelines use the standard U.S. convention of placing the home team on the right-hand side of box scores.Top scorers
Statistics current as of 4 October 2011| Rank | Scorer | Club | Goals |
| 1 | ![]() |
