Contra Costa County California Schools Calendar

More than a dozen separate boards decide when school starts in this county. Eighteen school districts and the county office of education share responsibility for roughly 168,000 public school students, making Contra Costa the 11th largest county school system in California. Families who move between Walnut Creek, Richmond, Antioch and Brentwood can find that break dates, minimum days and first-day-of-school dates differ from one district to the next.

School District Structure in Contra Costa County

Contra Costa is a county, not a parish or borough, and its public education system is a patchwork of unified, elementary and high school districts. The districts are:

• Mt. Diablo Unified School District, the largest in the county at about 30,000 students, serving Concord, Pleasant Hill, Clayton and Bay Point
• San Ramon Valley Unified School District, serving Danville, San Ramon and nearby communities
• West Contra Costa Unified School District, serving Richmond, San Pablo, El Cerrito, Hercules and Pinole
• Antioch Unified School District and Pittsburg Unified School District in East County
• Martinez Unified School District in the county seat
• John Swett Unified School District, serving Crockett and Rodeo
• Acalanes Union High School District (Lafayette, Moraga, Orinda and Walnut Creek) and Liberty Union High School District (Brentwood, Oakley, Byron and Discovery Bay)
• Elementary districts: Brentwood Union, Byron Union, Canyon, Knightsen, Lafayette, Moraga, Oakley Union, Orinda Union and Walnut Creek

Canyon Elementary is among the smallest districts in California, with fewer than 100 students.

Each district is governed by its own elected board of education or trustees, which adopts its calendar at a public meeting. The Contra Costa County Office of Education (CCCOE) in Pleasant Hill is led by an elected County Superintendent of Schools and an elected County Board of Education. CCCOE supports districts, runs special education, court and community school programs and early care and education, and does not set the calendar for local districts. A family’s address determines which district applies, and in some cases elementary and high school feeder districts follow different schedules.

The county is a mix of dense urban areas, wealthy suburbs, former industrial cities along the Carquinez Strait and fast-growing East County towns, so transportation, staffing and budgets vary widely.

Academic Calendar Structure

Most Contra Costa districts start in mid-August and end in late May or early June. Because exact dates differ by district and change every year, check your district’s adopted calendar rather than relying on a general pattern. Districts typically adopt the next year’s calendar in the spring.

• Semesters: Many middle and high schools use two semesters, ending in December or January. Elementary schools may report by trimester. Some districts use different systems, so check your district.
• Instructional days: California requires 180 instructional days and minimum annual minutes by grade. Districts meet this with their calendar design, including minimum days that count toward minutes.
• School day times: Elementary schools generally start between roughly 8:00 and 8:30 a.m., with middle and high schools beginning at similar or slightly later times. California law restricts early middle and high school start times, so many secondary schools begin no earlier than 8:00 a.m. for middle schools and 8:30 a.m. for high schools.

School Holidays and Breaks

Typical observances include Labor Day, Veterans Day, a Thanksgiving break (often the full week in Bay Area districts), winter break of about two weeks, Martin Luther King Jr. Day, a Presidents’ Day holiday that some districts extend to a full week in February, spring break in late March or April, and Memorial Day. Dates vary by district and by year. Some districts also observe Lunar New Year, Juneteenth or Cesar Chavez Day depending on local board decisions, so confirm on your district’s website.

Families comparing very different California counties can look at the Contra Costa County schools calendar and the Colusa County schools calendar. Contra Costa is a large, densely populated Bay Area county with many districts, while Colusa is a small, rural Sacramento Valley county, and the contrast shows how much local conditions shape school calendars.

How to Find the Official Calendar

Start with the website of your child’s district. Calendars are usually under “District,” “Parents” or “Community,” often as a PDF. CCCOE’s public schools directory lists every district and is useful if you are unsure who serves your address. Boards typically approve calendars at spring meetings, and agendas appear online beforehand. Individual schools may also publish supplemental calendars for sports, concerts and events.

Early Release Days, Teacher Workdays and Professional Development

Teachers report a few days before students in August. Many Contra Costa districts schedule regular early release or minimum days, often weekly or monthly, for staff collaboration, and some set aside full professional development days with no students. California sets some required training topics, which districts fit into these days. Families are notified through the calendar, email, text messages and parent portals, and communication in Spanish and other languages is common in larger districts such as West Contra Costa, Mt. Diablo and Antioch.

Emergency Closures and Weather Days

Closures here are less about snow and more about air quality, safety and infrastructure:

• Wildfire smoke: Smoke from the 2018 Camp Fire and later fires led Bay Area districts to cancel classes or move activities indoors.
• Industrial incidents: The county has refineries and chemical facilities in Martinez, Richmond, Rodeo and Pittsburg. The Contra Costa County Community Warning System can trigger shelter-in-place alerts affecting schools.
• Storms and flooding: Atmospheric rivers can close roads or damage campuses.
• Power outages and heat: Planned shutoffs in hillside areas and heat waves in East County can affect schedules.

Closure decisions are generally made by the district superintendent, often in coordination with the county health department, fire agencies and utilities. Notifications go out by automated phone, text and email, district websites and social media. Local TV stations such as KTVU, KPIX, KGO and NBC Bay Area, along with the East Bay Times, may also carry news. California does not require makeup days for every closure, and districts use calendar flexibility or state waivers for major emergencies.

Graduation and End-of-Year Schedule

High school finals generally occur in the last weeks of the spring semester, with graduations in late May or early June, often at school stadiums or off-campus venues in the larger districts. Elementary and middle schools hold promotion ceremonies near the last day. Report cards are issued at term ends, and families can usually view grades through an online parent portal.

Back-to-School and Registration

Re-enrollment usually opens in spring, with new student registration continuing through summer. Families commonly need proof of residency, immunization records and a birth certificate or other proof of age. Registration is handled online or at school sites or district offices. Because of district boundaries and inter-district transfer rules, confirm your address with the district first. Supply lists are typically posted in late summer, and many schools host orientation or meet-the-teacher nights. California’s expansion of transitional kindergarten also affects enrollment for younger children.

Special Programs and Calendar Implications

CCCOE operates special education, court and community school programs, and early care and education services, which may have different schedules. Districts also run continuation schools, adult education and independent study. Some offer specialty academies or career pathways with their own events. Dual enrollment programs follow the calendars of the Contra Costa Community College District, which can differ from K-12 schedules. Preschool and early childhood programs may follow separate calendars, so ask each program.

Athletics and Extracurricular Context

High school sports in Contra Costa County fall under the California Interscholastic Federation (CIF) North Coast Section. Athletic schedules are separate from the academic calendar, and games and practices may occur during breaks or near finals. Check your school’s athletic department for dates.

State Requirements and California Law

The California Department of Education sets the 180-day minimum and minimum annual instructional minutes by grade, and local boards design calendars within those limits. The state also sets limits on secondary school start times and some staff training requirements. Within those rules, each Contra Costa board has substantial control over start dates, breaks and minimum days.

Frequently Asked Questions

When does school start in Contra Costa County?
Most districts begin in mid-August, but each board sets its own date. Check your district’s website.

When does school get out for summer?
Typically late May or early June, depending on the district.

How many days are in a school year?
California requires 180 instructional days.

How do I find out if school is cancelled today?
Check your district’s alerts, website and social media, and local news such as KTVU, KPIX or the East Bay Times. In an industrial emergency, follow Community Warning System instructions.

What is the spring break schedule?
Usually one week in late March or April, though dates vary by district.

How do I enroll my child?
Contact the district that serves your address and provide proof of residency, immunization records and proof of age. Many districts offer online registration.

Are there year-round schools?
Most districts use a traditional calendar. Some alternative or independent study programs may differ, so ask the district.

Who do I contact with calendar questions?
Start with your child’s school or district office. CCCOE can help you identify the right district for your address.