Alex Villanueva

Alex Villanueva
33rd Sheriff of Los Angeles County
In office
December 3, 2018  December 5, 2022
Preceded byJim McDonnell
Succeeded byRobert Luna
Personal details
Born1963 (age 6162)
Chicago, Illinois, U.S.
Political partyRepublican (2025–present)
Democratic (before 2025)
SpouseVivian Villanueva
Children1
EducationSan Bernardino Valley College (AA)
Excelsior College (BLS)
California State University, Northridge (MPA)
University of La Verne (DPA)
Signature
Police career
CountryUnited States
DepartmentLos Angeles County Sheriff's Department
Service years1986–2022
RankSheriff (2018–2022)
Lieutenant (2011–2018)
Sergeant (2000–2011)
Deputy Sheriff (1986–2000)
Military career
AllegianceUnited States
BranchUnited States Air Force
California Air National Guard
California Army National Guard
Years of service1983–1993
Rank1st Lieutenant

Alejandro Villanueva is a former American law enforcement officer who served as the 33rd sheriff of Los Angeles County, California from 2018 until 2022. He defeated incumbent sheriff Jim McDonnell in the 2018 L.A. County Sheriff's race, making him the first to unseat an incumbent in over 100 years. Before becoming Sheriff, he was a lieutenant with the Los Angeles County Sheriff's Department.

The first member of the Democratic Party to be elected Sheriff in 138 years, Villanueva campaigned as a reformer and appealed to some progressive values, but has received notoriety for more conservative policies during his tenure, as well as high levels of corruption. Villanueva lost his bid for reelection in 2022 by a wide margin of 61.3% to 38.7% against former Long Beach Police Chief Robert Luna. He became a Republican in 2025.