| Year: | 2006 |
| Dates: | March 18 - March 25 |
| Country: | United States |
| Num Teams: | 4 |
| Confederations: | 1 |
| Venues: | 1 |
| Cities: | 1 |
| Champion Other: | Houston Dynamo |
| Count: | 1 |
| Second Other: | D.C. United |
| Third Other: | New York Red Bulls |
| Matches: | 6 |
| Goals: | 10 |
| Top Scorer: | Jaime Moreno (3) |
| Prevseason: | 2005 |
| Nextseason: | 2007 |
The 2006 Carolina Challenge Cup was a four-team round robin pre-season competition hosted by the Charleston Battery. The Houston Dynamo won the 2006 tournament and went on to win the MLS Cup that year.
Four clubs competed in the tournament:
| Team | League | Appearance | |
|---|---|---|---|
 Charleston Battery (hosts) | USL-1 | 3rd | |
| D.C. United | MLS | 3rd | |
| Houston Dynamo | MLS | 1st | |
| New York Red Bulls | MLS | 1st | |
| Team | Pld | W | L | D | GF | GA | GD | Pts | |
|---|---|---|---|---|---|---|---|---|---|
| Houston Dynamo | 3 | 2 | 0 | 1 | 5 | 1 | +4 | 7 | |
| D.C. United | 3 | 1 | 0 | 2 | 3 | 2 | +1 | 5 | |
| Charleston Battery | 3 | 1 | 1 | 1 | 2 | 2 | 0 | 4 | |
| New York Red Bulls | 3 | 0 | 3 | 0 | 0 | 5 | -5 | 0 |
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