CA · County

San Mateo Car Accidents & Crashes

San Mateo County has recorded 6,566 traffic crashes since 2024, including 10 fatal incidents. In the last 24 hours, 26 new crashes were reported. Crash volume is highest on US-101 N and US-101 S.

Data is sourced from the California Crash Records System (CCRS), maintained by the California Highway Patrol and updated daily, and the CA 511 live incident feed, refreshed every 15 minutes. CCRS records include party details, injury severity, vehicle information, and precise geographic coordinates. Last updated Oct. 27, 2026.

Breakdown by type: 2,437 accident.

2,437

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

2

Today

Reported since midnight

Today's Accidents Today's Fatalities

showing most recent 500 incidents with location data · click a marker to view details

Crash Records

San Mateo Incidents 2,437 results

2437 accident

CHP : Traffic Collision with Injuries on US-101 Southbound north of CA-92 E (San Mateo). Left and center lanes blocked. Expect delays.

Moderate Accident

US-101 S 9 hours, 31 minutes ago

CHP : Disabled vehicle on CA-92 Westbound east of San Mateo Bridge - High Rise (Foster City). Left lane blocked. Expect delays.

Moderate Accident

CA-92 W 11 hours, 16 minutes ago

CHP : Traffic Collision on I-280 Northbound north of Sneath Ln (San Bruno). Left lanes blocked. Expect delays.

Moderate Accident

I-280 N 13 hours, 31 minutes ago

CHP : Traffic Hazard on CA-92 Eastbound east of S El Camino Real (San Mateo). Right lane affected. Expect delays.

Moderate Accident

CA-92 E 13 hours, 46 minutes ago

CHP : Traffic Collision on CA-92 Eastbound at US-101 N (San Mateo). Lane affected. Expect delays.

Moderate Accident

CA-92 E 14 hours, 1 minute ago

CHP : Traffic Hazard on US-101 Southbound north of Ralston Ave (Belmont). Lane affected. Expect delays.

Moderate Accident

US-101 S 15 hours, 1 minute ago

CHP : Traffic Hazard on I-280 Southbound north of Bunker Hill Dr (San Mateo). Left lane affected. Expect delays.

Moderate Accident

I-280 S 15 hours, 46 minutes ago

CHP : Residual delays on CA-92 Eastbound west of S Delaware St (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

CA-92 E 16 hours, 1 minute ago

CHP : Traffic Hazard on CA-92 Westbound east of Ralston Ave (San Mateo). Lane affected. Expect delays.

Moderate Accident

CA-92 W 16 hours, 46 minutes ago

CHP : Traffic Hazard on US-101 Northbound south of Oyster Point Blvd (South San Francisco). Right lane affected. Expect delays.

Moderate Accident

US-101 N 16 hours, 46 minutes ago

CHP : Traffic Collision with Injuries on US-101 Southbound north of Marsh Rd (Menlo Park). Left lanes blocked. Expect delays.

Moderate Accident

US-101 S 20 hours, 46 minutes ago

CHP : Traffic Hazard on US-101 Northbound at Whipple Ave (Redwood City). Lane affected. Expect delays.

Moderate Accident

US-101 N 23 hours, 1 minute ago

CHP : Traffic Hazard on I-280 Southbound north of Sneath Ln (San Bruno). Center lanes affected. Expect delays.

Moderate Accident

I-280 S 23 hours, 1 minute ago

CHP : Traffic Hazard on I-280 Northbound north of CA-92 W (San Mateo). 2nd lane from the left blocked. Expect delays.

Moderate Accident

I-280 N 23 hours, 31 minutes ago

CHP : Traffic Hazard on US-101 Northbound south of Whipple Ave (Redwood City). Center lanes affected. Expect delays.

Moderate Accident

US-101 N 23 hours, 46 minutes ago

CHP : Disabled vehicle on US-101 Southbound north of E Poplar Ave (San Mateo). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 1 day, 6 hours ago

CHP : Disabled vehicle on CA-92 Westbound west of San Mateo Bridge - High Rise (Foster City). Lane affected. Expect delays.

Moderate Accident

CA-92 W 1 day, 7 hours ago

CHP : Disabled vehicle on I-280 Southbound south of Alpine Rd (Menlo Park). Right shoulder affected. Expect delays.

Moderate Accident

I-280 S 1 day, 9 hours ago

CHP : Vehicle fire on US-101 Southbound north of Broadway (Burlingame). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 1 day, 9 hours ago

CHP : Traffic Hazard on US-101 Northbound south of Dore Ave (San Mateo). Lane affected. Expect delays.

Moderate Accident

US-101 N 1 day, 11 hours ago

CHP : Disabled vehicle on US-101 Southbound north of E Millbrae Ave (Millbrae). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 1 day, 11 hours ago

CHP : Traffic Collision on US-101 Northbound south of Broadway (Burlingame). Lanes blocked. Expect delays.

Moderate Accident

US-101 N 1 day, 12 hours ago

CHP : Traffic Hazard on CA-92 Eastbound west of Foster City Blvd (Foster City). 2nd lane from the left affected. Expect delays.

Moderate Accident

CA-92 E 1 day, 17 hours ago

CHP : Traffic Hazard on CA-92 Eastbound west of W Hillsdale Blvd (San Mateo). Right lane affected. Expect delays.

Moderate Accident

CA-92 E 1 day, 18 hours ago

CHP : Traffic Collision on US-101 Northbound south of Ralston Ave (Belmont). Right shoulder affected. Expect delays.

Moderate Accident

US-101 N 1 day, 23 hours ago

CHP : Traffic Collision on US-101 Southbound north of Whipple Ave (Redwood City). Right shoulder blocked. Expect delays.

Moderate Accident

US-101 S 2 days, 2 hours ago

CHP : Disabled vehicle on CA-92 Westbound at Mariners Island Blvd (San Mateo). Lane blocked. Expect delays.

Moderate Accident

CA-92 W 2 days, 5 hours ago

CHP : Disabled vehicle on CA-92 Westbound at San Mateo Bridge - High Rise (Foster City). Left lane blocked. Expect delays.

Moderate Accident

CA-92 W 2 days, 9 hours ago

CHP : Traffic Hazard on US-101 Southbound south of Woodside Rd (Redwood City). Right lane blocked. Expect delays.

Moderate Accident

US-101 S 2 days, 10 hours ago

CHP : Residual delays on CA-92 Westbound east of Foster City Blvd (Foster City). Right shoulder affected. Expect delays.

Moderate Accident

CA-92 W 2 days, 12 hours ago

CHP : Traffic Collision with Injuries on CA-84 Eastbound and Westbound at CA-1 (San Gregorio). Lane affected. Expect delays.

Moderate Accident

CA-84 E 2 days, 14 hours ago

CHP : Traffic Collision with Injuries on US-101 Northbound south of E 3RD Ave (San Mateo). Right lane blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 15 hours ago

CHP : Disabled vehicle on I-280 Northbound north of Hickey Blvd (Daly City). Right lane blocked. Expect delays.

Moderate Accident

I-280 N 2 days, 17 hours ago

CHP : Traffic Collision on US-101 Northbound south of Dore Ave (San Mateo). Left lanes blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 18 hours ago

CHP : Traffic Collision on US-101 Northbound south of E Hillsdale Blvd (San Mateo). Lane blocked. Expect delays.

Moderate Accident

US-101 N 2 days, 18 hours ago

CHP : Disabled vehicle on US-101 Southbound at Sister Cities Blvd (South San Francisco). Right lane blocked. Expect delays.

Moderate Accident

US-101 S 2 days, 20 hours ago

CHP : Traffic Collision with Injuries on US-101 Southbound north of Grand Ave (South San Francisco). Lanes affected. Expect delays.

Moderate Accident

US-101 S 3 days, 1 hour ago

CHP : Traffic Collision with Injuries on US-101 Southbound at Lagoon Way (South San Francisco). Right shoulder affected. Expect delays.

Moderate Accident

US-101 S 3 days, 2 hours ago

CHP : Traffic Hazard on I-280 Northbound south of Golf Course Dr (Unincorporated). Right lane affected. Expect delays.

Moderate Accident

I-280 N 3 days, 9 hours ago

CHP : Disabled vehicle on US-101 Northbound at University Ave (East Palo Alto). Lane blocked. Expect delays.

Moderate Accident

US-101 N 3 days, 10 hours ago

CHP : Traffic Hazard on I-280 Northbound south of Golf Course Dr (Unincorporated). Right lane affected. Expect delays.

Moderate Accident

I-280 N 3 days, 10 hours ago

CHP : Traffic Collision on US-101 Northbound north of Grand Ave (South San Francisco). Lane affected. Expect delays.

Moderate Accident

US-101 N 3 days, 10 hours ago

CHP : Disabled vehicle on CA-1 Northbound at Serramonte Blvd (Daly City). Right lane blocked. Expect delays.

Moderate Accident

CA-1 N 3 days, 11 hours ago

CHP : Traffic Hazard on US-101 Northbound south of E Hillsdale Blvd (San Mateo). Left and center lanes affected. Expect delays.

Moderate Accident

US-101 N 3 days, 12 hours ago

CHP : Traffic Hazard on US-101 Northbound south of Holly St (San Carlos). 3rd lane from the left blocked. Expect delays.

Moderate Accident

US-101 N 3 days, 13 hours ago

CHP : Traffic Hazard on CA-1 Southbound north of Serramonte Blvd (Daly City). Lane affected. Expect delays.

Moderate Accident

CA-1 S 3 days, 13 hours ago

CHP : Disabled vehicle on I-280 Northbound south of CA-84 W (Woodside). Left lane blocked. Expect delays.

Moderate Accident

I-280 N 3 days, 14 hours ago

CHP : Traffic Hazard on US-101 Northbound south of Ralston Ave (Belmont). Right and center lanes affected. Expect delays.

Moderate Accident

US-101 N 3 days, 15 hours ago

CHP : Traffic Hazard on I-280 Southbound north of Sand Hill Rd (Menlo Park). Lanes affected. Expect delays.

Moderate Accident

I-280 S 3 days, 15 hours ago

CHP : Grass fire on I-280 Southbound entering at John Daly Blvd (Daly City). Right shoulder affected. Expect delays.

Moderate Accident

I-280 S 3 days, 18 hours ago