Injury claims in Contra Costa County, California

I take injury cases from Contra Costa County. This page covers what the state's crash record says about the county, which court a case from here is filed in, and what changes when the defendant is the county itself. This is general information, not legal advice.

The county's record, 2023–2025

Officers reported 31,895 crashes in Contra Costa County across 2023, 2024 and 2025. Those crashes killed 238 people and injured 14,763. A further 6,245 have been reported so far in 2026, from January to August, which killed 20 and injured 3,233. That year is still filling in and is not part of the totals above. The split was 10,104 in 2023, 11,255 in 2024 and 10,536 in 2025.

• 904 involved a pedestrian
• 679 involved a bicycle
• 795 involved a motorcycle
• 1,769 involved a commercial truck, 613 of them a tractor-trailer
• 8,967 were recorded as hit-and-run

The most common kind of crash was rear-end (9,505 reports) , then sideswipe (7,603). The Vehicle Code section officers cited most often was Veh. Code, § 22350 — driving faster than was safe for the conditions — which is not the same as breaking the posted limit, and is why a driver can be at fault for speeding at 30 in a 35. Striking a bicycle is not one of the collision types: the type records the geometry of the crash, and cycling is not a geometry. Bicycle involvement is a separate field, recorded on 679 reports in this county. 34% of crashes were recorded in darkness or at dusk.

These are counts of reported crashes. They are not adjusted for population or for how much people travel, they say nothing about fault in any crash, and a small difference between two figures is ordinary variation rather than a finding.

Where in the county

The reports name 20 incorporated cities in Contra Costa County. About 21% of the county's crashes were recorded outside any incorporated city — unincorporated county, where the roadway is usually the county's own responsibility rather than a city's.

121 junctions in the county carry enough reported crashes to rank and could be confirmed by two independent sources. The Contra Costa County junction list .

Where a Contra Costa County case is filed

In the Superior Court of California, County of Contra Costa, in the ordinary case. Code of Civil Procedure section 395 makes the county where the injury happened a proper court for the action, and the county where a defendant resided when the action was filed is a proper court too — so where a driver from one county hits someone in another, there is a real choice to make, and it is not always obvious which way to go.

The crash reports themselves name a court district, and in Contra Costa County the ones appearing most often were Contra Costa Superior Court Walnut Creek Courthouse, Richmond Superior Court George D. Carroll Courthouse, Bay Superior, Contra Costa Superior Court Richard Arnason Justice Center and Contra Costa County Richmond Superior Court George D. Carroll Courthouse. That is the district for the traffic matter on the report. It is not a determination of civil venue and an injury case does not have to follow it, but it does show which courthouses actually serve this county.

The forms a California injury case starts with · filing procedure in this court · how long a claim takes · why cases sit for years.

When the defendant is the county or a city inside it

A pothole, a signal stuck on the wrong phase, a bend with no warning sign, a crosswalk painted to nowhere — these point at a public entity, and they run on a different clock. A claim for injury against a public entity must generally be presented to the entity within six months of when the cause of action accrued. It is delivered or mailed to the clerk, secretary or auditor of the entity, or to its governing body at its principal office, and some entities now accept it electronically if their own ordinance says so.

Two things people get wrong about this. It is not a lawsuit, so filing in court does not satisfy it. And the two-year deadline everyone has heard of does not rescue a missed six months — once the claim is late, the route back is an application for leave to present a late claim, and then a petition to the Superior Court if the entity refuses.

Claims against a government entity in California · premises and dangerous conditions.

Trauma care in Contra Costa County

The county has one designated trauma centre.

• John Muir Medical Center, Walnut Creek — adult Level II

Which one you were taken to matters to a claim, because that is where the first imaging, the first operative note and the first record of your complaints all live — and those records carry more weight in an injury case than almost anything else.

Your medical records in an injury claim · liens and reimbursement.

Cities in Contra Costa County with their own page

• Concord — 5,298 reported crashes, 20 killed, 2,100 injured
• Richmond — 4,769 reported crashes, 36 killed, 1,831 injured
• Antioch — 2,096 reported crashes, 38 killed, 1,126 injured

Common questions

Which court hears an injury case from Contra Costa County?

The Superior Court of California, County of Contra Costa. Code of Civil Procedure section 395 makes the county where the injury happened a proper court, and so is the county where a defendant lived when the action was filed — so there is sometimes a genuine choice between two counties.

The county or a city in it may be at fault. What is the deadline?

Six months, and it is not a deadline to sue — it is a deadline to present a written claim to the entity itself. A claim for death or injury to person must generally be presented within six months of when the cause of action accrued, delivered or mailed to the clerk, secretary or auditor of the entity, or to its governing body. Missing it is usually fatal to the claim even though the ordinary deadline to file suit is two years.

Do these figures tell me whether a road is dangerous?

No. They are counts of reported crashes over 2023, 2024 and 2025, not rates. They are not adjusted for how many people travel, and a county with more people will report more crashes without being more dangerous. They are a record of what was reported, nothing more.

Sources: crash counts from the California Crash Reporting System (CCRS), California Highway Patrol, 2023, 2024 and 2025 exports, retrieved 2026-09-06 (method and limitations). Trauma centre designations from the California Emergency Medical Services Authority, "California Designated / ACS Verified Trauma Centers", updated 25 August 2025. Venue: Code Civ. Proc., § 395 (amended Stats. 2002, ch. 806, § 8). Government claims: Gov. Code, § 911.2 (six months to present), § 915 (how and where to present; amended Stats. 2020, ch. 371, § 7), § 911.4 (leave to present a late claim) and § 946.6 (petition for relief).