List of Washington Nationals managers

The Washington Nationals are an American professional baseball franchise based in Washington, D.C. They are members of the National League (NL) East Division in Major League Baseball (MLB). The team began playing in 1969 as an expansion team in Montreal, Quebec, then known as the Montreal Expos. There have been 16 different managers in their franchise's history. In baseball, the head coach of a team is called the manager (or more formally, the field manager). The Nationals are the only NL team to have never been in a World Series. The team has played their home games at the Nationals Park since 2008. The Nationals are owned by Ted Lerner, with Mike Rizzo as their general manager.

The Expos' first manager was Gene Mauch, who managed for six seasons. Felipe Alou is the franchise's all-time leader in regular season games managed (1,408) and regular season game wins (691). Jim Fanning is the only Expos manager to have gone into the post-season. Buck Rodgers and Alou are the only managers to have won the NL Manager of the Year Award with the Expos, in 1987 and 1994 respectively. Karl Kuehl, Jim Fanning, and Tom Runnells have all spent their entire MLB managing careers with the Expos/Nationals. After Manny Acta was fired during the 2009 season, Jim Riggleman, the bench coach, was named interim manager to replace him, and was promoted to the position full-time for the 2010 season. After Riggleman resigned during the 2011 season, the team hired veteran manager Davey Johnson, who had previously served as an advisor to Rizzo. Johnson led the team to the 2012 National League East title and the franchise's first playoff berth since moving to Washington.

The team's most recent manager was former Arizona Diamondbacks third base coach Matt Williams, who replaced Johnson after his retirement following the 2013 season.