The 2006 Lamar Hunt U.S. Open Cup ran from June through September, open to all soccer teams in the United States.
The 2005 Lamar Hunt U.S. Open Cup ran from June through September, 2005, open to all soccer teams in the United States.
The 2004 Lamar Hunt U.S. Open Cup ran from June through September, 2004, open to all soccer teams in the United States.
The 2002 Lamar Hunt U.S. Open Cup, a tournament open to all soccer teams in the United States, ran from June through October.
The 2001 Lamar Hunt U.S. Open Cup ran from June through October 2001, open to all soccer teams in the United States.
The 2000 Lamar Hunt U.S. Open Cup ran from June through October, 2000, open to all soccer teams in the United States.
The 1999 Lamar Hunt U.S. Open Cup ran from June to October 1999, open to all soccer teams in the United States. It was the first Open Cup tournament to be named after Lamar Hunt. The Rochester Raging Rhinos of the A-League defeated the Colorado Rapids 2–0 in the final at Columbus Crew Stadium in Columbus, Ohio. The Rhinos became the first, and as of 2022, only non-Division I team to win the Open Cup since the inception of Major League Soccer, defeating four MLS teams in the tournament. Another A-League team, the Charleston Battery, also reached the semifinals, and the A-League's Staten Island Vipers were the other non-division one squad to beat an MLS team.
The 1998 U.S. Open Cup ran from June through October, 1998, open to all soccer teams in the United States.
The 1997 U.S. Open Cup ran from June through October, 1997, open to all soccer teams in the United States.
The 2007 Lamar Hunt U.S. Open Cup was the 94th edition of the USSF's annual national soccer championship, running from June through early October.
The 2008 Lamar Hunt U.S. Open Cup was the 95th edition of the USSF's annual national soccer championship, running from June through early September.
The 2009 Lamar Hunt U.S. Open Cup was the 96th edition of the USSF's annual national soccer championship, running from June through early September.
The 2010 Lamar Hunt U.S. Open Cup was the 97th edition of the USSF's annual national soccer championship, running from June through early October.
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.
The 2012 Lamar Hunt U.S. Open Cup was the 99th edition of the U.S. Open Cup, the annual national soccer championship of the United States. It ran from May to August and was organized by the United States Soccer Federation. Seattle Sounders FC of Major League Soccer entered the competition as the three-time defending champions and appeared in their fourth consecutive U.S. Open Cup Final, losing to Sporting Kansas City on August 8, 2012.
The 2013 Lamar Hunt U.S. Open Cup was the 100th edition of the oldest ongoing competition in American soccer. Qualification began in November 2012 in the fifth tier, although the United States Soccer Federation did not announce the format until March 5, 2013.
The 2014 Lamar Hunt U.S. Open Cup was the 101st edition of the oldest ongoing competition in American soccer. Qualification began in November 2013 in the fifth tier. The USSF announced the tournament format on April 24, 2014.
The 2015 Lamar Hunt U.S. Open Cup was the 102nd edition of the oldest ongoing competition in American soccer.
The 2016 Lamar Hunt U.S. Open Cup was the 103rd edition of the oldest ongoing competition in American soccer.
The 2017 Lamar Hunt U.S. Open Cup was the 104th edition of the oldest ongoing competition in American soccer.