Barry Jantz (born September 8, 1959) is a California politician, currently a Member of the City Council in the City of La Mesa, within San Diego County.

Born in Whittier, California, Jantz moved to La Mesa in 1973, and attended Helix High School, Grossmont College, and San Diego State University (SDSU), where he majored in Journalism and minored in Political Science. He wrote for the Grossmont College G and SDSU's the Daily Aztec.

After forming the political consulting and public relations firm of Jantz-Baldwin, with Steve Baldwin, later a member of the California State Assembly, Jantz ran successfully for La Mesa City Council in 1990. He has won re-election three times, most recently in 2002.

Jantz has been involved in California Republican politics throughout the years, having served as Treasurer of the San Diego County Republican Party and as a delegate to the California Republican Party, where he served on the Executive Committee and as Chairman of the Initiatives Committee. In 2000, he was appointed one of George W. Bush's 54 presidential electors from California.

From 2001 to 2004, Jantz served as District Chief of Staff to California State Assemblyman Jay La Suer (R-77). In late 2004 he was appointed Chief Executive Officer of the Grossmont Healthcare District, a public hospital district in East San Diego County.

Jantz' commentaries have appeared in the San Diego Union-Tribune, San Diego Daily Transcript, San Diego Business Journal, East County Californian, and other newspapers. He is a correspondent for the FlashReport, a web-based portal for California political news and commentary.

Jantz and his wife, Colleen, have one daughter, Kayleigh.