The Oroville Union High School District is located in the rural north valley at the base of the Sierra Nevada foothills, about seventy miles north of Sacramento. The district encompasses 723 miles of eastern Butte County. The district has two comprehensive high schools, one continuation school, one community day school and one adult education school. The Butte-Glenn Community College and California State University, Chico are located approximately 25 miles from Oroville. Oroville is the Butte County seat and the primary source of income for the city's population of 20,737 residents (55,000 in the greater Oroville area). Other significant sources of income are agriculture, light manufacturing, tourism, retail trade services, transportation, public utilities, construction, finance, government and public administration. The 2017 median household income in the city was $37,721. Las Plumas High School was established in 1960 as the second comprehensive high school to alleviate overcrowding at Oroville High School. The sixty-four acre campus is the largest school in the district. The original buildings have been supplemented during growth phases by 40 portables. There are approximately 1300 students enrolled at the school.