Cathleen Galgiani (born January 4, 1964) is an American politician who served in the California State Senate. A Democrat, she represented the 5th Senate District, which encompasses San Joaquin County, and portions of Stanislaus and Sacramento counties. Galgiani was a member of the California Legislative LGBT Caucus. Prior to her election to the State Senate in 2012, she served in the California State Assembly, representing the 17th Assembly District. Before her service as an elected official, she was the Chief of Staff to her predecessor, Assemblymember Barbara Matthews.