The 2009 MLS Western Conference was won by the Los Angeles Galaxy, who finished with 49 points from 30 matches (15-8-7 record). The Galaxy secured the top seed in the Western Conference playoffs and went on to win MLS Cup 2009, defeating Real Salt Lake in the final.
The complete 2009 Western Conference standings were: 1. Los Angeles Galaxy (49 pts), 2. Houston Dynamo (47 pts), 3. Seattle Sounders FC (47 pts), 4. FC Dallas (44 pts), 5. Real Salt Lake (40 pts), 6. Chivas USA (37 pts), 7. Colorado Rapids (36 pts), and 8. San Jose Earthquakes (25 pts). The top four teams qualified for the MLS Cup Playoffs.
This was Seattle Sounders FC's inaugural MLS season, and they made an impressive playoff run despite being an expansion team. Real Salt Lake, despite finishing fifth in the regular season, made a remarkable playoff run to reach MLS Cup final, though they ultimately lost to the Galaxy on penalty kicks.