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 as an expansion team in Montreal, Quebec, then known as the Montreal Expos. There have been 18 different managers in the franchise's history. The team has played its 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 and  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 season, Jim Riggleman, the bench coach, was named interim manager to replace him, and was promoted to the position full-time for the  season. After Riggleman resigned during the season and John McLaren ran the team for three games as an interim manager, the team hired veteran manager Davey Johnson, who had previously served as an advisor to Rizzo. Johnson led the team to the National League East title and the franchise's first playoff berth since moving to Washington and was 2012's NL Manager of the Year, but the team did not advance past the 2012 National League Division Series. Johnson retired after the season. Matt Williams took over in, leading the team to another National League East title that season, and was 2014 NL Manager of the Year, but the team did not advance past the 2014 NLDS, and Williams was fired after an unsuccessful second year in. Dusty Baker managed the team in and, leading Washington to consecutive National League East titles, but the team did not advance beyond the NLDS in either season and Baker's contract was not renewed after the 2017 season. The Nationals hired Dave Martinez in October 2017 to take the helm in ; along with leading the team to its first World Series championship, Martinez has the most victories as a manager since the team moved to Washington.

Managers
''Notes: Managers from 1969 through 2004 are of the Montreal Expos; those from 2005 to the present are of the Washington Nationals. Statistics are correct as of the end of the 2023 Major League Baseball season.''