The Portland Timbers are an American professional soccer club based in Portland, Oregon. The Timbers compete in Major League Soccer (MLS) as a member of the Western Conference. The Timbers have played their home matches at Providence Park since 2011, when the team began play as an expansion team in the league.

Peregrine Sports, under the majority ownership of Merritt Paulson, was awarded an expansion berth by Major League Soccer in 2009 to operate a Portland team. Paulson had acquired the second-division incarnation of the Timbers in 2007 and later established the Portland Thorns women's team in 2012. The MLS team is a phoenix club, and the fourth soccer franchise based in Portland (second top-level) to carry the legacy of the Timbers name, which originated with the team that competed in the North American Soccer League (NASL) from 1975 to 1982.

In 2013, the Timbers finished the regular season in first place in the Western Conference, clinching both their first-ever playoff appearance and a CONCACAF Champions League berth. In 2015, the franchise won the Western Conference Finals in the playoffs, and their first major trophy, the MLS Cup, becoming the first team in Cascadia to do so. In 2017, the club again finished the regular season in first place in the Western Conference. In 2018, the Timbers again made the playoffs, advancing in three rounds, defeating archrival Seattle in the semifinals along the way, and made the MLS Cup where they lost 2–0 to Atlanta United FC. In 2020, the Timbers won the one-off MLS is Back Tournament, defeating Orlando City SC in the final, and once again qualified for the Champions League. In 2021, the Timbers won the Western Conference and once again were runners-up in MLS Cup, falling to New York City FC 4–2 on penalties after a 1–1 score at extra time.

Portland has long-standing rivalries with nearby clubs Seattle Sounders and Vancouver Whitecaps FC, with whom they compete for the Cascadia Cup.