| Tournament details | |
|---|---|
| Country | United States | 
| Final positions | |
| Champions |  Los Angeles Galaxy  (2nd title)  | 
| Runners-up | FC Dallas | 
| Tournament statistics | |
| Top goal scorer(s) |  Herculez Gomez  Melvin Tarley (6 goals each)  | 
The 2005 Lamar Hunt U.S. Open Cup ran from June through September, 2005, open to all soccer teams in the United States.
The Los Angeles Galaxy won their second Open Cup championship with a 1–0 victory over FC Dallas at the Home Depot Center in Carson, California.
Although two Major League Soccer sides played in the final, the tournament featured several runs by underdogs. The Des Moines Menace of the Premier Development League beat two USL First Division teams to reach the Fourth Round. The Minnesota Thunder of the USL First Division beat three MLS teams in succession to reach the semifinals. The Rochester Raging Rhinos continued to play to record crowds and beat the MetroStars before losing in a shootout to the Chicago Fire. Four of the tournament's final 15 games went to overtime.
Home teams listed on top of bracket
Note: Scorelines use the standard U.S. convention of placing the home team on the right-hand side of box scores.
Teams from USASA and PDL start.
| June 8, 2005 | Salinas Valley Samba (USASA) | 1–1 (a.e.t.) (4–2 pen)  | Cascade Surge (PDL) | Salem, Oregon | 
| Jeffery Stepan 33' | (Report) Report 2 | Tony Chavez 26' | Stadium:  McCulloch Stadium  Attendance: 511 Referee: Eduardo Irigoyen (USA)  | 
| June 8, 2005 | Dallas Roma F.C. (USASA) | 7–2 | Cocoa Expos (PDL) | Cocoa, Florida | 
| Jamie Harrigan 10', 89'  Patrick Shamu 24', 38' Carl Bussey 24' Juan Sastoque 46' Matt Williams 59'  | (Report) | Janak Altidore 44'  James Phillips 47' (pen)  | Stadium:  Cocoa Expo Sports Center  Attendance: 100 Referee: Richard Rodriguez (USA)  | 
Teams from USASA, PDL, and USL-2.
| June 15, 2005 | Baltimore Colts F.C. (USASA) | 0–3 | Richmond Kickers Future (PDL) | Richmond, Virginia | 
| Report |  Dominic Oduro 45', 62'  Christian Neagu 64'  | Stadium:  Sports Backers Stadium  Attendance: 254 Referee: John Schmitz (USA)  | 
| June 15, 2005 | Cincinnati Kings (USL-2) | 2–4 | Reggae Boyz (USASA) | Indianapolis, Indiana | 
| Travis Sobers 85'  George Kithas 86'  | (Report) | Dave Beck 8', 70'  Moussa Zagnogo 25', 49'  | Stadium:  Kuntz Memorial Stadium  Attendance: 293 Referee: Doug Ferguson (USA)  | 
| June 15, 2005 | Ocean City Barons (PDL) | 3–0 | Greek American Atlas (USASA) | Jamaica, New York | 
| Byron Carmichael 63'  Mike Todd 65' Tony Donatelli 86'  | Report | Stadium:  Belson Stadium  Attendance: 101 Referee: Steve Karaduzovic (USA)  | 
| June 15, 2005 | AAC Eagles (USASA) | 1–4 | Chicago Fire Premier (PDL) | Algonquin, Illinois | 
| Marek Nowicki 48' | Report | Drew Deguarian 9'  Jeffery Rowland 29' David Leung 42' Brandon Moss 84'  | Stadium: Jacobs High School Attendance: -- Referee: Abbey Okulaja (USA)  | 
| June 15, 2005 | Azzurri F.C. (USASA) | 2–5 | Dallas Roma F.C. (USASA) | Bedford, Texas | 
|  Alex Smith 50'  Jay Needham 57'  | Report |  Carl Bussey 17'  Juan Sastoque 36' Matt Williams 63' Mark Rowland 77' Jesus Rodriguez 89'  | Stadium:  Pennington Field  Attendance: -- Referee: Fernando Galvan (USA)  | 
| June 15, 2005 | Orange County Blue Star (PDL) | 1–3 | El Paso Patriots (PDL) | El Paso, Texas | 
| Daniel Frias 90' | Report | Omar Mora 28'  Tyson Wahl 42' (og) Tyler Theslof 43'  | Stadium:  Patriot Stadium  Attendance: -- Referee: Jair Marrufo (USA)  | 
| June 15, 2005 | Pittsburgh Riverhounds (USL2) | 1–1 (a.e.t.) (2–4 pen)  | Des Moines Menace (PDL) | Waukee, Iowa | 
| Greg Victor 101' | (Report) | Brian Biggerstaff 111' | Stadium:  Waukee Stadium  Referee: Hidajet Tica (USA)  | 
| June 15, 2005 | Salinas Valley Samba (USASA) | 2–2 (a.e.t.) (6–5 pen)  | Sonoma County Sol (USASA) | Santa Rosa, California | 
| David Frank 90'  Chris Bessimer 113'  | (Report) | Trevor Hurst 59'  D.J. Sigler 108'  | Stadium:  Ernie Nevers Field  Attendance: 550 Referee: Pete Fletcher (USA)  | 
Four USL-1 and four USL-2 teams enter.
| June 29, 2005 | Charleston Battery (USL1) | 2–3 | Des Moines Menace (PDL) | Waukee, Iowa | 
|  Greg Simmonds 60'  Lazo Alavanja 65'  | (Report) | Tomas Boltnar 8'  Michael Kraus 14' Armin Mujdzic 80'  | Stadium:  Waukee Stadium  Attendance: 1,492 Referee: Doug Jotzke (USA)  | 
| June 29, 2005 | Charlotte Eagles (USL2) | 4–1 | El Paso Patriots (PDL) | El Paso, Texas | 
| Patrick Daka 12  Chris Lemons 47' Dustin Swinehart 71', 77'  | (Report) | Miguel Larrosa 90' | Stadium:  Patriot Stadium  Attendance: -- Referee: Fernando Galvan (USA)  | 
| June 29, 2005 | Long Island Rough Riders (USL2) | 0–4 | Ocean City Barons (PDL) | Ocean City, New Jersey | 
| (Report) | Ruben Mingo 30'  Tony Donatelli 64' (pen) Christopher Williamson 67' Steven Wacker 70'  | Stadium:  Carey Stadium  Attendance: -- Referee: Hossam Saad (USA)  | 
| June 29, 2005 | Dallas Roma F.C. (USASA) | 0–5 | Wilmington Hammerheads (USL2) | Wilmington, North Carolina | 
| (Report) |  Kenny Bundy 9'  Paul Chase 11' Ben Hill 25' James Gledhill 75' Junior Zarate 90'  | Stadium:  Legion Stadium  Attendance: -- Referee: Kenneth George (USA)  | 
| June 29, 2005 | Richmond Kickers Future (PDL) | 0–3 | Virginia Beach Mariners (USL1) | Virginia Beach, Virginia | 
| (Report) | David Castellanos 5'  Darren Caskey 23' Tim O'Neill 71'  | Stadium:  Virginia Beach Sportsplex  Attendance: 530 Referee: Dan Stead (USA)  | 
| June 29, 2005 | Reggae Boyz (USASA) | 0–5 | Western Mass Pioneers (USL2) | Ludlow, Massachusetts | 
| (Report) | Omar McFarlane 5', 61'  Kyle Fletcher 41' Rigel Qosa 59' Kevin McMenamin 79'  | Stadium:  Lusitano Stadium  Attendance: 1,250 Referee: Guido Gonzalez (USA)  | 
| June 29, 2005 | Chicago Fire Premier (PDL) | 1–2 | Minnesota Thunder (USL1) | Saint Paul, Minnesota | 
| Brandon Moss 90' | (Report) |  Johnny Menyongar 62'  89' (og)  | Stadium:  James Griffin Stadium  Attendance: 1,115 Referee: Troy Cohrs (USA)  | 
| June 29, 2005 | Salinas Valley Samba (USASA) | 1–3 | Seattle Sounders (USL1) | Tukwila, Washington | 
| Adam Smart 51' | (Report) [ usurped ] |  Brent Whitfield 65', 90'  Roger Levesque 75'  | Stadium:  Starfire Sports Complex  Attendance: 521 Referee: Jeff Hosking (USA)  | 
Four USL-1 and four MLS teams enter.
| July 12, 2005 | Seattle Sounders (USL1) | 0–2 | Portland Timbers (USL1) | Portland, Oregon | 
| (Report) | Stadium:  PGE Park  Attendance: 2,462 Referee: Yader Reyes (USA)  | 
| July 13, 2005 | C.D. Chivas USA (MLS) | 3–2 (a.e.t.) | Charlotte Eagles (USL2) | Davidson, North Carolina | 
|  Esteban Arias  Thiago Martins Isaac Romo  | (Report) Report 2 | Stadium:  Richardson Stadium  Attendance: 2,500 Referee: Andrew Chapin (USA)  | 
| July 13, 2005 | Des Moines Menace (PDL) | 5–1 | Atlanta Silverbacks (USL1) | Clarkston, Georgia | 
| Matthew Kreikemeyer  Tomas Boltnar Michael Kraus Edwin Disang  | (Report) | Stadium:  DeKalb Memorial Stadium  Attendance: -- Referee: Roni Canales (USA)  | 
| July 13, 2005 | Real Salt Lake (MLS) | 4–6 (a.e.t.) | Minnesota Thunder (USL1) | Saint Paul, Minnesota | 
|  Jason Kreis  Jamie Watson  | (Report) | Stadium:  James Griffin Stadium  Attendance: 2,218 Referee: Abbey Okulaja (USA)  | 
| July 13, 2005 | Ocean City Barons (PDL) | 4–8 | Richmond Kickers (USL1) | Richmond, Virginia | 
| Byron Carmichael  Tony Donatelli Matthew Delicate  | (Report) | Stadium:  Sports Backers Stadium  Attendance: 702 Referee: Ben Jones (USA)  | 
| July 13, 2005 | Wilmington Hammerheads (USL2) | 1–3 (a.e.t.) | FC Dallas (MLS) | Dallas, Texas | 
| Derek Popovich  | (Report) | Stadium:  UT-Dallas  Attendance: -- Referee: Jair Marrufo (USA)  | 
| July 13, 2005 | Virginia Beach Mariners (USL1) | 1–2 | Rochester Raging Rhinos (USL1) | Rochester, New York | 
|  John Barry Nusum  | (Report) Report 2 | Stadium:  Frontier Field  Attendance: 7,838 Referee: Kenneth Heller (USA)  | 
| July 13, 2005 | Chicago Fire (MLS) | 3–1 | Western Mass Pioneers (USL2) | Ludlow, Massachusetts | 
|  Will John  Lubos Reiter  | (Report) Report 2 | Stadium:  Lusitano Stadium  Attendance: 3,124 Referee: Erich Simmons (USA)  | 
| August 3, 2005 | San Jose Earthquakes (MLS) | 2–0 | Portland Timbers (USL1) | Portland, Oregon | 
|  Wade Barrett 27'  Brian Mullan 63'  | (Report) | Stadium:  PGE Park  Attendance: 6,607 Referee: Alex Prus (USA)  | 
| August 3, 2005 | C.D. Chivas USA (MLS) | 2–5 | Los Angeles Galaxy (MLS) | Carson, California | 
|  Douglas Sequeira 4'  Ramon Ramirez 20'  | (Report) |  Cobi Jones 16'  Joseph Ngwenya 36' Herculez Gomez 45' Landon Donovan 89' Paulo Nagamura 90'+  | Stadium:  Home Depot Center Track & Field Stadium Attendance: -- Referee: Michael Kennedy (USA)  | 
| August 3, 2005 | Des Moines Menace (PDL) | 1–6 | Kansas City Wizards (MLS) | Parkville, Missouri | 
| Matt Wieland 12' | (Report) |  Davy Arnaud 9'  Josh Wolff 16' (pen), 65' (pen) Sasha Victorine 31' Scott Sealy 75' Davy Arnaud 83'  | Stadium: Julian Field Attendance: 2,000 Referee: Roni Canales (USA)  | 
| August 3, 2005 | Colorado Rapids (MLS) | 1–4 | Minnesota Thunder (USL1) | Saint Paul, Minnesota | 
| Alain Nkong 69' | (Report) | Melvin Tarley 38', 48', 72', 76' | Stadium:  James Griffin Stadium  Attendance: 3,191 Referee: Marcel Yonan (USA)  | 
| August 3, 2005 | D.C. United (MLS) | 3–1 | Richmond Kickers (USL1) | Richmond, Virginia | 
|  Freddy Adu 26'  Christian Gomez 76' (pen), 81'  | (Report) | McColm Cephas 69' | Stadium:  University of Richmond Stadium  Attendance: 8,412 Referee: Abbey Okulaja (USA)  | 
| August 3, 2005 | FC Dallas (MLS) | 3–1 (a.e.t.) | Columbus Crew (MLS) | Columbus, Ohio | 
|  Carey Talley 29'  Abe Thompson 113' Eddie Johnson 116'  | (Report) | Kyle Martino 36' | Stadium:  Jesse Owens Memorial Stadium  Attendance: -- Referee: Ricardo Salazar (USA)  | 
| August 3, 2005 | MetroStars (MLS) | 1–3 | Rochester Raging Rhinos (USL1) | Rochester, New York | 
| Sergio Galvan Rey 85' | (Report) |  Scott Palguta 20'  Mauro Carabajal 30' Rene Rivas 58' (pen)  | Stadium:  Frontier Field  Attendance: 10,547 Referee: Erich Simmons (USA)  | 
| August 3, 2005 | Chicago Fire (MLS) | 3–2 (a.e.t.) | New England Revolution (MLS) | Ludlow, Massachusetts | 
|  Andy Herron 18', 99'  C.J. Brown 96'  | (Report) Report 2 |  Shalrie Joseph 22'  Andy Dorman 120'  | Stadium:  Lusitano Stadium  Attendance: 3,866 Referee: Terry Vaughn (USA)  | 
| August 24, 2005 | Los Angeles Galaxy (MLS) | 2–1 | San Jose Earthquakes (MLS) | San Jose, California | 
| Herculez Gomez 5', 31' | (Report) | Ronald Cerritos 76' | Stadium:  Spartan Stadium  Attendance: 5,134 Referee: Terry Vaughn (USA)  | 
| August 24, 2005 | Minnesota Thunder (USL1) | 3–1 | Kansas City Wizards (MLS) | Parkville, Missouri | 
|  Johnny Menyongar 33', 58'  Shavar Thomas 54' (og)  | (Report) | Ryan Pore 71' | Stadium:  Julian Field  Attendance: 1,551 Referee: Michael Kennedy (USA)  | 
| August 24, 2005 | FC Dallas (MLS) | 1–1 (a.e.t.) (4–1 p)  | D.C. United (MLS) | Germantown, Maryland | 
| Carlos Ruiz 90+4' | (Report) | Christian Gomez 47' | Stadium:  Maryland SoccerPlex  Attendance: 4,258 Referee: Abbey Okulaja (USA)  | |
| Penalties | ||||
|  Carlos Ruiz: scored  Greg Vanney: scored Bobby Rhine: scored Abe Thompson: scored  |  Freddy Adu: scored  John Wilson: missed Joshua Gros: saved  | |||
| August 24, 2005 | Chicago Fire (MLS) | 1–1 (a.e.t.) (5–4 p)  | Rochester Raging Rhinos (USL1) | Rochester, New York | 
| Samuel Caballero 34' | (Report) | Doug Miller 60' | Stadium:  Frontier Field  Attendance: 11,121 Referee: Alex Prus (USA)  | |
| Penalties | ||||
|  Thiago: scored  Chad Barrett: scored Iván Guerrero: scored Zach Thornton: scored Chris Armas: scored  |  Doug Miller: scored  Tenywa Bonseu: scored Jonathan Bolaños: missed Greg Howes: scored Rene Rivas: scored  | |||
| September 14, 2005 | Minnesota Thunder (USL1) | 2–5 | Los Angeles Galaxy (MLS) | Carson, California | 
|  Johnny Menyongar 54'  Chad Dombrowski 85'  | (Report) |  Landon Donovan 29'  Herculez Gomez 44', 81' Tyrone Marshall 77' Joseph Ngwenya 82'  | Stadium:  Home Depot Center  Attendance: 4,373 Referee: Jair Marrufo (USA)  | 
| September 14, 2005 | Chicago Fire (MLS) | 0–1 | FC Dallas (MLS) | Frisco, Texas | 
| (Report) | Ronnie O'Brien 20' | Stadium:  Pizza Hut Park  Attendance: 7,311 Referee: Baldomero Toledo (USA)  | 
| FC Dallas (MLS) | 0–1 | Los Angeles Galaxy (MLS) | 
|---|---|---|
| (Report) | Herculez Gomez 25' | 
FC Dallas  | Los Angeles Galaxy  | 
| Position | Player | Club | Goals | 
|---|---|---|---|
| 1 | Herculez Gomez | Los Angeles Galaxy | 6 | 
| Melvin Tarley | Minnesota Thunder | 6 | |
| 3 | Johnny Menyongar | Minnesota Thunder | 5 | 
| 4 | McColm Cephas | Richmond Kickers | 4 |