The 2013 Los Angeles Galaxy season was the club's eighteenth season of existence, and their eighteenth season in Major League Soccer, the top tier of the American and Canadian soccer pyramids.

The Galaxy entered the season as the two-time defending MLS Cup champions. They were eliminated by Real Salt Lake in the Conference Semifinals of the MLS Cup Playoffs. The team reached the semifinals of the 2012-13 CONCACAF Champions League, where they were knocked out by Monterrey. The Galaxy also qualified for the 2013-14 CONCACAF Champions League by virtue of winning the 2012 MLS Cup.

Where a player has not declared an international allegiance, nation is determined by place of birth. Squad correct as of March 2, 2013.

Updated to matches played on October 27, 2013 8:00 p.m. PDT. Source: MLSSoccer.com
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Updated to matches played on October 2013. Source: MLSSoccer.com
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¹The highest ranked U.S.-based MLS club qualifies to the 2014–15 CONCACAF Champions League seeding Pot A. (Canadian teams cannot qualify for the Champions League through MLS; the Canadian qualifier is the winner of the 2014 Canadian Championship.) The other U.S. representatives in the 2014–15 CONCACAF Champions League are: