Tom Barrett (Wisconsin politician)

Tom Barrett
Official portrait, 2022
United States Ambassador to Luxembourg
In office
February 10, 2022 – January 17, 2025
PresidentJoe Biden
Preceded byRandy Evans
Succeeded byStacey Feinberg
44th Mayor of Milwaukee
In office
April 19, 2004 – December 22, 2021
Preceded byMarvin Pratt (acting)
Succeeded byCavalier Johnson
Member of the U.S. House of Representatives
from Wisconsin's 5th district
In office
January 3, 1993 – January 3, 2003
Preceded byJim Moody
Succeeded byJim Sensenbrenner
Member of the Wisconsin Senate
from the 5th district
In office
December 13, 1989 – January 3, 1993
Preceded byMordecai Lee
Succeeded byPeggy Rosenzweig
Member of the Wisconsin State Assembly
In office
April 5, 1984 – December 13, 1989
Preceded byThomas W. Meaux
Succeeded byDavid Cullen
Constituency9th district (1984–1985)
14th district (1985–1989)
Personal details
BornThomas Mark Barrett
(1953-12-08) December 8, 1953
PartyDemocratic
SpouseKris Barrett
Children4
EducationUniversity of Wisconsin, Madison (BA, JD)

Thomas Mark Barrett (born December 8, 1953) is an American diplomat and politician who served as the United States ambassador to Luxembourg from 2022 to 2025. He previously served as the 44th mayor of Milwaukee, Wisconsin from 2004 until 2021.

A member of the Democratic Party, he was previously elected to the Wisconsin State Assembly (1984–1989), Wisconsin Senate (1989–1993) and U.S. House of Representatives (1993–2003). On April 6, 2004, Milwaukee elected Tom Barrett as its 40th mayor. He won reelection as mayor in 2008, 2012, 2016 and 2020. After having unsuccessfully sought the Democratic nomination for governor of Wisconsin in 2002, Barrett was the party's nominee for governor in both 2010 and 2012, losing both elections to Scott Walker. When he left office as mayor, Barrett was the longest-serving current mayor of one of the 50 largest cities in the United States.