Jeanne Shaheen (born January 28, 1947), an American politician and member of the Democratic Party, is the junior United States Senator from New Hampshire. The first woman in U.S. history to be elected as both a Governor and U.S. Senator, she was the first woman to be elected Governor of New Hampshire, serving from 1997 to 2003. Shaheen ran for the United States Senate in 2002, but was narrowly defeated by Republican challenger John E. Sununu. The race was the first time two candidates with Arab-American families, although Shaheen herself is not Arab-American, have squared off in a Senate race. She has most recently served as Director of the Harvard Institute of Politics, before resigning to run again for the U.S. Senate in the 2008 election, where she defeated Sununu in a rematch.

Shaheen was born Cynthia Jeanne Bowers in Saint Charles, Missouri. She is the wife of Lebanese-American attorney and political operative Bill Shaheen. Together they have three children. She graduated from high school in Selinsgrove, Pennsylvania, and has earned a bachelor's degree in English from Shippensburg University of Pennsylvania and a master's degree from the University of Mississippi. She taught high school in Mississippi and moved to New Hampshire in 1973, where she taught school and owned a small business.

A Democrat, she worked on several campaigns before running for office in 1990, when she was elected to the state Senate. In 1996, 1998 and 2000 she was elected governor of New Hampshire.