John W. Mannion (born July 8, 1968)[1] is an American educator and politician who has served as the U.S. representative from New York's 22nd congressional district since 2025.

[2] Mannion was elected in 2020 to the New York State Senate, defeating Republican Angi Renna and became the first Democrat to hold the seat in more than 50 years.

[5] Mannion attended Bishop Ludden High School and later graduated from Binghamton University with a bachelor of science's degree in biology.

[7] A recount ultimately declared Mannion the winner, with a margin of 10 votes, making it the closest race in the 2022 New York State Senate elections.

He also served as a member of the following committees: Mannion won the 2024 Democratic primary for the U.S. House of Representatives in New York's 22nd congressional district.