Joel P. Engardio (born September 17, 1972) is an American politician, writer, and public-safety advocate who represented District 4 on the San Francisco Board of Supervisors from 2023 until he was recalled in 2025.

Engardio is a native of Saginaw, Michigan, where he attended Arthur Hill High School.

Engardio graduated with a bachelor's in journalism from Michigan State University and a Master of Public Administration from the Harvard Kennedy School of Government.

Engardio is a former journalist. He moved to San Francisco in 1998 to cover Tom Ammiano's mayoral campaign during the 1999 San Francisco mayoral election.

Engardio and Tom Shepard directed the documentary Knocking about Jehovah's Witnesses.

Engardio ran failed campaigns for District 7 supervisor in 2012, 2016, and 2020.

Engardio ran for District 4 supervisor after his neighborhood was redistricted from District 7. He was elected in November 2022, unseating incumbent Gordon Mar by a margin of 50.9% to 49.1%. Engardio is the first gay supervisor elected to represent the city's westside. Engardo was also the first candidate to defeat an incumbent supervisor elected in their own right, since district elections returned to San Francisco in 2000.

In 2023, Engardio organized the first night market in the Sunset District along with other community groups. The first event drew over an estimated 10,000 visitors. This spurred similar events in other neighborhoods, such as Chinatown and The Castro.