Cathleen Galgiani (born January 4, 1964) is an American politician who served in the California State Senate.

Galgiani attended San Joaquin Delta College before receiving her Bachelor's degree from California State University, Sacramento.

Galgiani served as the consultant to the legislative committee on the development of University of California, Merced.

[1] In so doing, she became the eighth openly LGBT currently-serving member of the California Legislature,[2] alongside Speaker Toni Atkins (D–San Diego), Assemblymembers Sabrina Cervantes (D–Riverside), Susan Eggman (D–Stockton), Todd Gloria (D–San Diego) and Evan Low (D–Campbell), as well as Senators Ricardo Lara (D–Bell Gardens) and Scott Wiener (D–San Francisco).

Galgiani was first elected to the State Senate after narrowly defeating Republican Assemblyman Bill Berryhill on November 6, 2012.