The 1996 United States Senate election in Maine was held November 5, 1996. Incumbent Republican U.S. Senator William Cohen decided to retire instead of seeking a fourth term. To replace him, U.S. Representative Joseph E. Brennan won the Democratic primary while political consultant Susan Collins won the Republican primary. A competitive general election ensued, but Collins ultimately won out over Brennan, keeping the seat in the Republican column. With Collins' election to the Senate in 1996, Maine became only the second state after California to have two sitting female senators.