Zoe Lofgren was elected to the U.S. House in 1994 with 65 percent of the vote, defeating Republican Lyle Smith. During that campaign, she made headlines when she sought unsuccessfully to have "mother" as well as county supervisor listed as her occupation on the ballot.
She was re-elected in 1996 with 66 percent of the vote, defeating Republican Chuck Wojslaw. She won a third House term in 1998, defeating Republican Horace Thayn with 73 percent of the vote.
Lofgren was elected to the San Jose Community College Board in 1979. She was elected to the Santa Clara County Board of Supervisors in 1980 and won re-election three times. In June 1994 she won the Democratic primary for the congressional seat in an upset of former San Jose Mayor Tom McEnery.
She won her seat again in 2000 with 72 percent of the vote. She was re-elected in 2002.
She was uncontested in 2004.