Deborah Ann Stabenow (/ˈstæbənaʊ/ STAB-ə-now; née Greer; born April 29, 1950) is an American politician who served from 2001 to 2025 as a United States senator from Michigan. A member of the Democratic Party, she was Michigan's first female U.S. senator.

Before her election to the Senate, Stabenow was a member of the U.S. House of Representatives, representing Michigan's 8th congressional district from 1997 to 2001. Previously, she served on the Ingham County Board of Commissioners and in the Michigan State Legislature.

Stabenow was reelected to Senate in 2006, 2012, and 2018. She became the state's senior U.S. senator upon Carl Levin's retirement in 2015. Stabenow chaired the Senate Agriculture Committee from 2011 to 2015 and again since 2021. She became chair of the Senate Democratic Policy Committee in 2017. At the start of the 118th Congress, Stabenow became the dean of the Michigan congressional delegation, upon the retirement of Representative Fred Upton. On January 5, 2023, she announced that she would not seek reelection in 2024.

Stabenow was born in Gladwin, Michigan, the daughter of Anna Merle (née Hallmark) and Robert Lee Greer. She grew up in Clare, Michigan. She graduated from Clare High School, where she was president of her junior class, the first female class president at the school. She received a Bachelor of Arts degree from Michigan State University in 1972. Also from Michigan State University, she earned a Master of Social Work magna cum laude in 1975.

While a graduate student at Michigan State University in 1974, Stabenow ran for public office for the first time, inspired by the threatened closure of a local nursing home. She won her first election in November 1974, becoming just the third woman elected to the Ingham County Board of Commissioners, on which she served from 1975 to 1978. Stabenow was the first woman and youngest person to date to chair the board of commissioners in 1977 and 1978. She was preceded as chair by one of her political mentors, Ken Hope. She was also instrumental in establishing a women's commission in Ingham County.

In 1978, Stabenow challenged Michigan State Representative Tom Holcomb in a primary election. She won the primary and eventually the general election for the 58th House District. Stabenow served in the Michigan House of Representatives from 1979 to 1990. She became a force in state Democratic politics and the first woman in House leadership to preside over the House. In 1990, Stabenow ran for the Michigan Senate seat being vacated by William A. Sederburg. She won the election, taking office in 1991 and serving one term through 1994.

In 1994, Stabenow ran in Michigan's Democratic gubernatorial primary to challenge incumbent Republican John Engler in the general election. U.S. Congressman Howard Wolpe won the primary with a plurality of 35% of the vote to Stabenow's 30%. After the primary, Wolpe chose Stabenow as his running mate, and she appeared on the general election ballot as the Democratic nominee for lieutenant governor. Engler defeated the Wolpe–Stabenow ticket, 61%–38%.

In 1996, Stabenow ran for a seat in the United States House of Representatives, challenging incumbent Republican U.S. Congressman Dick Chrysler for the opportunity to represent Michigan's 8th congressional district. She defeated Chrysler 54%–44%. In 1998, she was reelected with 57% of the vote. In the House, Stabenow served on the Agriculture and Science Committees.