John Mannion Bio
John W. Mannion (born July 8, 1968) is an American educator and politician who has served as the U.S. representative for New York’s 22nd congressional district since 2025. A member of the Democratic Party, he previously represented the 50th district in the New York State Senate from 2020 to 2024. He is known for being the first Democrat to hold that state Senate seat in more than 50 years.
Before entering elected office, Mannion spent years working as a high school biology teacher and as president of the West Genesee Teachers’ Association. He won the 2024 general election against incumbent Republican Brandon Williams to begin his time in the U.S. House of Representatives.
Early Life and Background
John W. Mannion was born and raised in Syracuse, New York. He is the grandson of Irish immigrants, a family background that shaped his deep roots in central New York. His mother worked for New York Telephone, and his father was employed by New York Central Railroad, giving the family strong ties to the region’s working-class communities.
Mannion attended Bishop Ludden High School in the Syracuse area, where he completed his secondary education. He then went on to study biology at Binghamton University, earning a Bachelor of Science degree in the field. His interest in science and teaching would later define his career path.
He continued his education at SUNY Oswego, where he earned a Master of Science degree in secondary science education. This combination of biology knowledge and teaching training prepared him for a long career in the classroom before he entered public service.
Path to US Politics
After finishing his graduate studies, Mannion became a high school biology teacher, working across several schools in central New York. He taught at Nottingham High School and Christian Brothers Academy before joining the West Genesee Central School District, where he also served as president of the West Genesee Teachers’ Association. These roles gave him direct experience advocating for students, teachers, and public schools.
His work as a union leader helped him build strong relationships across the region and raised his profile in local political circles. Mannion decided to bring his advocacy for public education and working families into elected office, entering the political arena as a Democrat.
In 2018, he ran for the New York State Senate in the 50th district but narrowly lost to the Republican incumbent, Bob Antonacci. Two years later, in 2020, he returned to the race and won, beginning his career as an elected official.
John Mannion Career
Early Career (2018-2020)
Mannion’s first run for public office came in 2018, when he challenged Republican incumbent Bob Antonacci for the New York State Senate seat in the 50th district. He lost that race by a narrow margin, but the experience helped him sharpen his message and expand his support base in central New York.
He spent the next two years continuing his teaching work and staying active in his community. During this period, Mannion focused on issues affecting public schools, working families, and local economic development, building the policy foundation that would guide his future campaigns.
New York State Senate Breakthrough (2020-2024)
In 2020, Mannion ran again for the 50th district state Senate seat and won with 52.57% of the vote, defeating Republican Angi Renna. His victory made him the first Democrat to hold the seat in more than 50 years, marking a major political shift in the region.
During his time in the State Senate, Mannion served as chairperson of the Committee on Disabilities, focusing on policies that supported individuals with disabilities and their families. He also served on additional committees that addressed education, health, and local community issues important to his district.
His 2022 re-election campaign was the closest race in the 2022 New York State Senate elections. On election night, Republican Rebecca Shiroff led by 396 votes before absentee ballots were counted. A recount ultimately declared Mannion the winner by a margin of just 10 votes, a dramatic result that highlighted the competitive nature of his district.
In 2023, Mannion announced his candidacy for New York’s 22nd congressional district, choosing not to seek re-election to the State Senate. During the campaign, three former staffers accused Mannion and his wife of creating a hostile work environment, but an investigation later cleared him of any wrongdoing.
U.S. House of Representatives Era (2025-Present)
Mannion won the 2024 Democratic primary for the U.S. House of Representatives in New York’s 22nd congressional district, defeating Sarah Klee Hood. He went on to face incumbent Republican Representative Brandon Williams in the general election, which he won to begin representing the district in the 119th Congress.
As a member of the U.S. House of Representatives, Mannion brings his background in education and his experience representing central New York to the federal level. His priorities include supporting public schools, working families, and the economic needs of his congressional district.
Notable Events and Milestones
One of the defining moments of Mannion’s career was his 2020 victory in the State Senate, which ended more than 50 years of Republican control of the 50th district seat. Another signature moment came in 2022, when he won re-election by just 10 votes after a recount, securing the closest race in that year’s New York State Senate elections. His 2024 victory over incumbent Brandon Williams marked his move to the U.S. House of Representatives and the start of his federal service.
John Mannion Career Wins
John W. Mannion has built his political career on a series of hard-fought election victories, beginning with his 2020 State Senate win and continuing through his 2024 congressional victory. Each win reflected his strong connection to voters in central New York and his focus on education, working families, and local community issues.
New York State Senate Highlights
Mannion’s first major political victory came in 2020, when he won 52.57% of the vote to defeat Republican Angi Renna for the 50th district State Senate seat. He followed this with a dramatic re-election win in 2022, winning by just 10 votes after a recount, which was the closest race in the 2022 New York State Senate elections.
U.S. House Highlights
In 2024, Mannion won the Democratic primary for New York’s 22nd congressional district, defeating Sarah Klee Hood. He then won the general election against incumbent Republican Brandon Williams, earning his seat in the U.S. House of Representatives and beginning service in the 119th Congress.
John Mannion Family
Family Background and Roots
John W. Mannion was born and raised in Syracuse, New York, and is the grandson of Irish immigrants. His mother worked for New York Telephone, and his father was employed by New York Central Railroad, giving the family strong ties to the region’s working-class history and labor traditions.
Personal Life
Mannion is married to his wife, Jennifer, and the couple has three children. His family life and his long career in public education have shaped his priorities as a legislator, with a focus on schools, children, and working families in central New York.