| Lamar Hunt U.S. Open Cup | |
| Year: | 1999 |
| Country: | United States |
| Winners: | Rochester Raging Rhinos (1st title) |
| Second: | Colorado Rapids |
| Scoring Leader: | Mugurel Dumitru (6 goals) |
| Prev Season: | 1998 |
| Next Season: | 2000 |
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.[1] The Rhinos became the first, and as of 2023, 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.
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.
Eight D3 Pro, four PDL, and four USASA teams start.
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Eight A-League teams enter.
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Eight MLS teams enter. ----
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| GK |  Pat Onstad | |||
| DF |  Andrew Restrepo | |||
| DF | ||||
| DF | Scott Schweitzer | |||
| DF | Tim Hardy | |||
| MF | Bill Sedgewick | |||
| MF | Nate Dalgicon | |||
| MF | Mali Walton | |||
| MF | Yari Allnut | |||
| FW | Mauro Biello | |||
| FW | ||||
| Substitutes: | ||||
| DF | ||||
| MF | Doug Miller | |||
| FW | ||||
| Head Coach: | ||||
| Pat Ercoli | ||||
| GK | Ian Feuer | |||
| DF | David Vaudreuil | |||
| DF | Marcelo Balboa | |||
| DF | Peter Vermes | |||
| DF | ||||
| MF | ||||
| MF | Matt McKeon | |||
| MF | Ross Paule | |||
| MF | Darren Sawatzky | |||
| FW |  Jorge Dely Valdes | |||
| FW | Paul Bravo | |||
| Substitutes: | ||||
| DF | ||||
| MF | ||||
| DF | ||||
| Head Coach: | ||||
| Glenn Myernick | ||||
| Position | Player | Club | Goals | |
|---|---|---|---|---|
| 1 | Mugurel Dumitru | San Diego Flash | 6 | |
| 2 | Jorge Munoz | Jacksonville Cyclones | 4 | |
| 2 | Kevin Wilson | Staten Island Vipers | 4 | |
| 2 | Brian Hunter | Wilmington Hammerheads | 4 |