2018 Major League Soccer season

The 2018 Major League Soccer season is the 23rd season of Major League Soccer, top division of soccer in the United States and Canada. The regular season began on March 3, 2018 and will conclude on October 28, 2018. The MLS Cup Playoffs will begin on October 31, 2018 and conclude with the MLS Cup 2018 on December 8, 2018. The league will take a nine-day hiatus in early June for the 2018 FIFA World Cup, reduced from previous breaks.

One new club, Los Angeles FC, joined the league as an expansion franchise and it is D.C. United's first season in their new soccer-specific stadium, Audi Field.

Toronto FC are the defending Supporters' Shield champions and defending MLS Cup champions.

Personnel and sponsorship
Note: All teams use Adidas as kit manufacturer.