Thursday's charges by Santa Barbara District Attorney's office names four victims.
He is facing charged for two killings in Ventura County and two in Sacramento County.
DeAngelo now faces four counts of first-degree murder with special circumstances in Santa Barbara, though it was unclear when he might appear in court there.
Santa Barbara County District Attorney Joyce Dudley is expected to announceThursday afternoon whether or what charges will be filed against the suspected Golden State Killer.
As CrimeOnline previously reported, the Golden State Killer is thought to be responsible for a dozen murders and 50 rapes, all crimes committed across 10 CA counties in the decade between 1976 and 1986. He was a police officer in the California towns of Exeter and Auburn during the 70s.
Investigators said DNA from that crime scene was linked to other crimes they believe were committed by the so-called Golden State Killer.
Authorities also suspect DeAngelo killed Greg Sanchez, 27, and his girlfriend Cheri Domingo, 35, on July 27, 1981, inside a home also near Goleta, where Domingo had been house-sitting.
"This has been an ongoing discussion all district attorneys have been having, one that will not be decided tomorrow", Dudley said.
72-year-old Joseph DeAngelo, the former police officer believed to be the "Golden State Killer", was captured last month.
In a stunning development nearly 40 years after the case went cold, DeAngelo was taken into custody on April 24 when prosecutors used advanced forensic DNA technology and genealogical information posted to a public website by a distant relative to identify him.