Seth Michael Magaziner (born July 22, 1983) is an American investment professional and politician serving as the U.S. representative for Rhode Island's 2nd congressional district since 2023.^[1][2] A member of the Democratic Party, he previously served as the 31st General Treasurer of Rhode Island from 2015 until 2023.^[3] Magaziner won the November 2022 election to succeed retiring representative James Langevin.

Seth Magaziner was born in Bristol, Rhode Island, on July 22, 1983, to Suzanne and Ira Magaziner.^[4][5] Ira is a policy advisor for politicians, governments, and non-governmental organizations.^[6] Suzanne is Catholic and Ira is Jewish.^[7][8] Seth is the oldest of three children.^[9]

Magaziner graduated from Milton Academy in Milton, Massachusetts, in 2002.^[10] He then attended Brown University, where he served as president of the Brown University Democrats, president of the College Democrats of Rhode Island, and as a member of the Brown University Steering Committee on Slavery and Justice.^[11][12] Magaziner graduated from Brown with a Bachelor of Arts in history in 2006.^[13] He received a Master of Business Administration from the Yale School of Management in 2010.^[11][14]

Magaziner worked as a school teacher at Creswell Elementary School in Opelousas, Louisiana, from 2006 to 2008, as a Teach For America member.^[3] In 2009, he worked as an associate at Point Judith Capital, a Rhode Island-based venture capital firm.^[15]

After graduate school, Magaziner worked at Trillium Asset Management as a vice president.^[11] Magaziner was active in the successful campaign for same-sex marriage in Rhode Island. He served as a board member of Marriage Equality Rhode Island.^[6][16]

Magaziner serves on the board of directors of Crossroads Rhode Island, a homeless service organization.^[17] He previously served on the board of directors of Common Cause Rhode Island.^[3]

On October 22, 2013, Magaziner announced his candidacy for Rhode Island General Treasurer.^[3] He won the Democratic nomination in the September 9 primary election, defeating former Treasurer Frank Caprio.^[18] Magaziner was elected in the November 2014 general election, defeating Independent candidate Ernest A. Almonte.^[19]

In his first months in office, Magaziner developed a plan to establish the Rhode Island Infrastructure Bank (RIIB) to finance green infrastructure projects.^[20]

In June 2015, Magaziner launched a transparency initiative for the Employees' Retirement System of Rhode Island (ERSRI).^[21] In 2015, the treasurer's office announced it was pursuing two class-action lawsuits against fossil fuel industry companies BP and Plains All American^[22] for oil spills that allegedly harmed investors and the environment.

In February 2016, Magaziner was selected as chair of the Financial Literacy Committee for the National Association of State Treasurers.^[23]

Magaziner married Julia McDowell in 2018. The couple has a son.^[39][40] Magaziner's father is Ira Magaziner.^[41]