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Contra Costa County, CA Curfew Laws: Juvenile Curfew (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Weeknight curfew
10 p.m.-5 a.m. (Sun-Thu)
Weekend curfew
12:01 a.m.-5 a.m. (Fri/Sat nights)
Daytime curfew
During school hours for school-age minors
First violation
Written warning mailed to parents
Repeat violation
Infraction within 12 months
Enforcing agency
Sheriff's deputies
Applies to
Unincorporated county only, not the 19 cities

Summary

Minors under 18 may not be in any public place in unincorporated Contra Costa County between 10 p.m. and 5 a.m. Sunday through Thursday nights, or between 12:01 a.m. and 5 a.m. Friday and Saturday nights. A daytime curfew also bars school-age minors from public places during school hours. The Sheriff's Office enforces both under Ordinance Code Chapter 54-2.

City-specific rules exist: Brentwood, San Ramon, and Antioch have their own juvenile curfew rules that differ from Contra Costa County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

"Nighttime curfew hours" means: (1)On any Sunday, Monday, Tuesday, Wednesday, or Thursday, the hours between 10:00 p.m. of that day and 5:00 a.m. of the following day.(2)On any Saturday or Sunday, the hours between 12:01 a.m. and 5:00 a.m. ... (a)Nighttime curfew restriction: A minor may not be present in, about, or upon any public place during nighttime curfew hours.

Source: CCC Ordinance Code Ch. 54View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Ordinance Code: Supplement 103).

Full Breakdown

The Curfew for Minors Ordinance, adopted by Ordinance No. 2012-05 and amended by Ordinance No. 2024-23, applies only to the unincorporated area of Contra Costa County; the 19 incorporated cities set their own curfew rules. on Friday and Saturday nights, giving minors two extra hours out on weekend evenings before curfew starts. 006(f) as anyone under 18 who is not married, emancipated or on active military duty, to be present in a public place during those hours, and separately bars school-age minors from public places during the school day under the daytime curfew.

012 makes an establishment operator liable for knowingly letting a minor remain on the premises during nighttime hours unless the operator promptly calls the sheriff's office when the minor refuses to leave. 014 lists broad exceptions: minors going to or from work, school and religious activities, running an errand for a parent, accompanied by a responsible adult, on the sidewalk in front of their own home, or handling a medical emergency are all exempt. 016, a deputy must first ask the minor's age and reason for being out and may not cite unless satisfied no exception applies.

Violations & Fines

A first curfew violation draws only a written warning, mailed to the minor's parent or guardian, under Section 54-2.016(b). Any further violation by that minor within 12 months is charged as an infraction. Parents or guardians who knowingly let a minor break curfew, and establishment operators who knowingly let a minor stay past curfew without calling the sheriff, face the same infraction penalty under Sections 54-2.010 and 54-2.012.

Frequently Asked Questions

What time does the Contra Costa County juvenile curfew start?
On Sunday through Thursday nights, minors under 18 must be off public property between 10 p.m. and 5 a.m. On Friday and Saturday nights the curfew runs later, from 12:01 a.m. to 5 a.m., under Ordinance Code Section 54-2.006(g). This applies only in the unincorporated county, not inside any of the 19 cities.
What happens the first time a minor is caught out past curfew?
The deputy issues only a written warning, and the sheriff's office mails a notice to the minor's parent or legal guardian under Section 54-2.016(b). No fine or infraction is charged on a first offense. A second violation by the same minor within 12 months becomes a chargeable infraction.
Are there exceptions to the county's curfew for minors?
Yes. Section 54-2.014 exempts minors who are working, coming home from a school or religious event, running an errand for a parent, accompanied by a parent or responsible adult, standing on the sidewalk outside their own home, or dealing with a medical emergency, among other listed exceptions.
Can a business be cited for letting a minor stay out past curfew?
Yes. Section 54-2.012 makes it a violation for an establishment operator to knowingly allow a minor to remain on the premises during nighttime curfew hours, unless the operator promptly notifies the sheriff's office that the minor refused to leave when asked.

Sources & Official References

Other rules in Contra Costa County

All Contra Costa County rules

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