| MLS Cup Playoffs | |
| Year: | 2008 |
| Country: | United States |
| Num Teams: | 8 |
| Defending Champions: | Houston Dynamo |
| Champions: | Columbus Crew (1st title) |
| Runner-Up: | New York Red Bulls |
| Semi-Finalist1: | Chicago Fire |
| Semi-Finalist2: | Real Salt Lake |
| Matches: | 11 |
| Goals: | 25 |
| Top Goal Scorer: |  John Wolyniec |
| Prevseason: | 2007 |
| Nextseason: | 2009 |
The 2008 MLS Cup Playoffs were the postseason to Major League Soccer's 2008 season, and culminated with MLS Cup 2008 on November 23, 2008 at The Home Depot Center in Carson, California.
See main article: article and MLS Cup Playoffs. At the 2008 season's end, the top three teams of each conference made the playoffs; in addition the clubs with the next two highest point totals, regardless of conference, were added to the playoffs. In the first round of this knockout tournament, aggregate goals over two matches determined the winners; the Conference Championships were one match each, with the winner of each conference advancing to MLS Cup. In all rounds, the tie-breaking method was two 15-minute periods of extra time, followed by penalty kicks if necessary. The away goals rule was not used.
1 The New York Red Bulls earned the eighth and final playoff berth, despite finishing fifth in the Eastern Conference. They represent the fourth seed in the Western Conference playoff bracket, as only three teams in the Western Conference qualified for the playoffs.
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See also: MLS Cup 2008.