Cardinal Newman High School is an American Catholic high school located in Santa Rosa, California. The school was originally for boys, but shared some facilities with Ursuline High School for girls; it has been coeducational since Ursuline's closure in 2011. Its colors are Cardinal Red and Gold; its mascot is the cardinal. It is located in the Roman Catholic Diocese of Santa Rosa in California.

In October 2017, the school was significantly damaged by the Tubbs Fire, causing around 15 million dollars worth of damage to the campus. The school collected a 10 million dollar insurance payout, and received an additional 12 million in rebuilding donations.