|First Lady of San Francisco|
January 8 2004 – February 26 2006
|Preceded by||Blanche Vitero|
|Succeeded by||Jennifer Siebel|
|Assistant District Attorney for San Francisco|
|Born||Kimberly Ann Guilfoyle
March 9, 1969
San Francisco, California, U.S.
|Spouse(s)||Gavin Newsom (m. 2001–06)
Eric Villency (m. 2006–09)
|Residence||New York City|
|Education||Mercy High School|
|Alma mater||University of California, Davis
University of San Francisco
|Occupation||Attorney, television host|
|Known for||Fox News
Kimberly Ann Guilfoyle (//; (born March 9, 1969) is an American cable news personality and one of the co-hosts of The Five on Fox News Channel. She is a contributor to The O'Reilly Factor and Hannity, and is an occasional guest host for On the Record w/ Greta Van Susteren.
She was previously an anchor at Court TV and a legal analyst/commentator for Fox News and ABC. She is also known as the former wife of California politician Gavin Newsom, and was First Lady of San Francisco during Newsom's first two years as mayor of that city.
Guilfoyle is a second-generation Mainlander , born in San Francisco to a Puerto Rican mother and an Irish father. She grew up in the Mission District and Westlake and is a graduate of Mercy High School. Guilfoyle's mother, Mercedes, taught special education, and died of leukemia when Guilfoyle was eleven. Her father, Tony, was born in Ennis, County Clare, Ireland, and came to the U.S. at the age of 20. After serving 4 years in the US Army, he took up work in the construction trades. He later became a real estate investor and a close advisor to Mayor Newsom, until his death in 2008. Known as the "Godfather" in inner political circles his mantra was "For The People".
Guilfoyle graduated magna cum laude from the University of California, Davis, and received her Juris Doctor (J.D.) from the University of San Francisco School of Law in 1994. While in law school, she interned at the San Francisco district attorney's office. She also modeled for local department stores, including Macy's, and modeled Victoria's Secret lingerie in a bridal magazine.
After law school, Guilfoyle briefly worked as a prosecutor in San Francisco, but lost her job in 1996 when Terence Hallinan was elected District Attorney and fired fourteen of the city's prosecutors.
Guilfoyle then spent four years in Los Angeles as a Deputy District Attorney, working on adult and juvenile cases, including narcotics, domestic violence, kidnapping, robbery, arson, sexual assault and homicide cases. She received several awards at the Los Angeles District Attorney's Office, including Prosecutor of the Month.
In 2000, Guilfoyle was re-hired by Hallinan in the San Francisco District Attorney’s Office, where she served as an Assistant District Attorney from 2000 to 2004. While Assistant D.A., she and lead prosecutor James Hammer earned a conviction in the 2002 case People v. Noel and Knoller, a second-degree murder trial involving a dog mauling that received international attention.
In January 2004, Guilfoyle moved to New York to host the program Both Sides on Court TV, as well as to take a job as a legal analyst on Anderson Cooper 360°.
Guilfoyle joined Fox News Channel in February 2006, as host of the weekend show The Lineup. Though The Lineup was eventually canceled, she remained a regular contributor for the network and was later picked up as co-host of both The Five and Outnumbered, two of Fox's most popular programs. She also appears weekly on The O'Reilly Factor's recurring segment "Is it Legal?" and as a weekly Thursday guest on Brian Kilmeade's Kilmeade and Friends radio show.
In 2015, Guilfoyle released a semi-autobiographical book titled "Making the Case: How to Be Your Own Best Advocate" on her experiences growing up, working as a prosecutor, and encouraging people to always advocate for themselves. 
In 2001, she married Gavin Newsom, then a city supervisor, who was elected mayor of San Francisco in 2003. While married to Newsom, she went by the name Kimberly Guilfoyle Newsom. In January 2005, citing the strain of a bi-coastal marriage, Guilfoyle filed for divorce from Newsom. Their divorce was finalized on February 28, 2006.
On May 27, 2006, Guilfoyle married furniture heir Eric Villency on the island of Barbados. On October 4, 2006, she gave birth to her first child, a boy named Ronan Anthony. Guilfoyle and Villency announced their separation in June 2009 and eventually divorced.
- California Births, 1905 – 1995, Kimberly A. Guilfoyle (Birth Date: 03/09/1969, County of Birth: San Francisco)
- "The Five". Fox News Channel.
- "Kimberly Guilfoyle and Eric Villency". New York Times. 28 May 2006. Retrieved 8 October 2012.
- "S.F. political adviser Anthony Guilfoyle dies". San Francisco Chronicle. 2 December 2008. Retrieved 2013-01-08.
- Van Derbeken, Jaxon (6 May 2001). "NEWSMAKER PROFILE / Kimberly Guilfoyle and James Hammer / Prosecutors in S.F. dog mauling case an unusual pair". San Francisco Chronicle. Retrieved 2 February 2013.
- "Kimberly Guilfoyle biography". foxnews.com. Retrieved May 14, 2013.
- Brazil, Eric (21 April 1997). "Hallinan defends firing of deputies". The San Francisco Chronicle.
- Jones, Aphrodite (2003). Red Zone: The Behind-the-Scenes Story of the San Francisco Dog Mauling. New York: William Morrow. ISBN 0-06-053779-5.
- Polsky, Richard H. "San Francisco Dog Mauling: Insights into the fatal dog attack on Diane Whipple". Animal Behavior Counseling Services, Inc. Retrieved 19 July 2012.
- "Kimberly Guilfoyle Shows Us How To Make The Case For Ourselves". Forbes. Retrieved 2015-11-05.
- Gordon, Rachel (24 June 2011). "Gavin and Kimberly are officially divorced". The San Francisco Chronicle.
- "The Littlest Guilfency". SFist. San Francisco. 4 October 2006.
- "Splitsville for Kim Guilfoyle and Eric Villency". New York Post. 23 June 2009.
- "Fox News: "What are 'The Five' giving up for Lent?"". Fox News. Retrieved 13 Feb 2013.