Dianne Feinstein, longest serving woman in the Senate, has died at 90 Diane Feinstein, the longest-serving woman in United States Congressional history, died Tuesday at the age of Diane Feinstein, the longest-serving woman in United States Congressional history, died Tuesday at the age of 90. Feinstein, a California Democrat who represented the Golden State from 1992 to served in Congress for more than 30 years died. Feinstein was born in San Francisco in 1933. She attended Lowell High School before graduating from Stanford University in 1955. After college, Feinstein worked as a political activist and journalist She was elected to the San Francisco Board of Supervisors in 1969 in 1978 and served as governor from 1978 to In 1992, Feinstein was elected U.S. Secretary of State. Senator, defeating Republican incumbent Pete Wilson. She was re-elected in 1998, 2004, 2010 and 2018. Feinstein was a leading voice on issues such as gun control, immigration and climate change. She was a st...