The San Jose Earthquakes are an American professional soccer club based in San Jose, California. The Earthquakes compete in Major League Soccer (MLS) as a member of the Western Conference. Originally known as the San Jose Clash, the franchise began play in 1996 as one of the charter members of the league. The Earthquakes took part in the first game in MLS history, defeating D.C. United 1–0. The Earthquakes have won two MLS Cup titles (2001, 2003) and two Supporters' Shields (2005, 2012). In 2002, the team played in its first CONCACAF Champions Cup, making it to the quarterfinals.

The team holds a fierce rivalry with the LA Galaxy known as the California Clásico.

In 2005, the then-owner of the Earthquakes, Anschutz Entertainment Group, announced plans of the team relocating to Houston due to failing efforts to secure a soccer-specific stadium in San Jose. The organization in Houston would be considered an expansion team by the league, eventually becoming the Houston Dynamo, which began play in 2006. The Earthquakes returned after a two-year hiatus, resuming play in 2008. Since 2015, the Earthquakes have played their home games at PayPal Park (named Avaya Stadium from 2015 to 2019 and Earthquakes Stadium in 2020). The team previously played its home games at Buck Shaw Stadium on the Santa Clara University campus in Santa Clara, California, from 2008 to 2014.