Mount Diablo Unified School District

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Mount Diablo Unified School District (MDUSD) is a public school district in Contra Costa County, California, based in Concord. It was formed in 1948 from the Mount Diablo Union High School District and local grammar schools.

What MDUSD operates
- 29 elementary schools, 9 middle schools, 5 high schools
- 7 alternative school programs
- An adult education program
- More than 56 school sites with a budget of about $270 million

Students and staff
- Over 36,000 K-12 students
- More than 20,000 adult education students
- About 3,500 employees, including over 2,000 teachers

Area served
- Covers 150 square miles
- Includes the cities of Concord and Clayton; most of Pleasant Hill; parts of Walnut Creek, Pittsburg, Lafayette, and Martinez
- Also serves unincorporated areas such as Pacheco, Clyde, and Bay Point

Leadership
- Superintendent: Adam Clark, Ed.D.
- The Board of Education members are listed on the district’s site

Historical notes
- Clayton Valley High School was part of MDUSD from 1958 to 2012, then became a charter school
- Pacifica High School operated from 1955 to 1976, then reopened as Riverview Middle School
- Pleasant Hill High School operated from 1953 to 1980, then reopened as Pleasant Hill Middle School
- The earliest schools in the area were grammar schools; Concord’s first school was built in 1870
- MDUSD formed in 1948 from the Mount Diablo Union High School District and local grammar schools