The Milwaukee Brewers farm system consists of seven Minor League Baseball affiliates across the United States and in the Dominican Republic. Four teams are owned by the major league club, while three—the Nashville Sounds, Biloxi Shuckers, and Wisconsin Timber Rattlers—are independently owned.
The Brewers have been affiliated with the High-A Wisconsin Timber Rattlers of the Midwest League since 2009, making it the longest-running active affiliation in the organization among teams not owned by the Brewers. The longest affiliation in franchise history was with the Helena Gold Sox/Brewers, who were the team's Rookie affiliate in the Pioneer League for 32 seasons from 1985 to 2018; they were not partnered with Milwaukee in 2001 and 2002. The longest continuous affiliation in team history was the 23-year relationship with the Class A Beloit Brewers/Snappers of the Midwest League from 1982 to 2004. Their newest affiliate is the Nashville Sounds of the International League, which became the Brewers' Triple-A club in 2021; they were previously affiliated with Nashville from 2005 to 2014.
Geographically, Milwaukee's closest domestic affiliate is the Wisconsin Timber Rattlers, which are approximately 90 miles (140 km) away. Milwaukee's furthest domestic affiliate is the Arizona Complex League Brewers of the Rookie Arizona Complex League some 1,462 miles (2,353 km) away.