The 2009 MLS Western Conference was won by the LA Galaxy with 51 points in 30 games, securing the top seed in the Western Conference playoffs. The Galaxy finished with a record of 15-10-5, earning them the Supporters' Shield as the league's best regular season team.
The complete 2009 Western Conference standings were: LA Galaxy (51 pts), Chivas USA (44 pts), Seattle Sounders FC (47 pts), FC Dallas (42 pts), Real Salt Lake (40 pts), Houston Dynamo (39 pts), Colorado Rapids (38 pts), and San Jose Earthquakes (25 pts). This was Seattle Sounders FC's inaugural MLS season, and they made an impressive playoff run.
Real Salt Lake, despite finishing fifth in the Western Conference with 40 points, went on to win MLS Cup 2009 by defeating the LA Galaxy in the final at Qwest Field in Seattle. The 2009 season was notable for featuring 15 teams, with Seattle Sounders FC joining as an expansion franchise.