El Dorado High School (Placentia California)
 El Dorado High School is a 9th–12th grade public high school located in Placentia California. Established in 1966 it is one of four high schools in the Placentia-Yorba Linda Unified School District. The campus is located at 1651 Valencia Avenue approximately 29 miles from downtown Los Angeles and 18 miles from the California coastline.The school currently has an enrollment of over 2400 students. The school's first graduating class was the class of 1969.