Walnut Creek intersections ranked by reported crashes
16 confirmed surface-street junctions in Walnut Creek, Contra Costa County, carrying 276 reported crashes between them in 2023, 2024 and 2025. 22 junctions were attempted here and 16 could be confirmed by two independent sources; the rest were dropped rather than guessed at.
This is a count of reported crashes, not a measure of risk. It is not adjusted for traffic volume, and a difference of two or three crashes between neighbouring rows is within ordinary year-to-year variation rather than a real gap. It says nothing about fault or about any individual claim.
| # | Junction | County | Crashes | Injured | Killed | 2026 so far part year, not ranked |
|---|---|---|---|---|---|---|
| 1 | Oak Grove Rd & Ygnacio Valley Rd | Contra Costa | 54 | 40 | 2 | 10 |
| 2 | San Carlos Dr & Ygnacio Valley Rd | Contra Costa | 30 | 25 | 0 | 5 |
| 3 | Bancroft Rd & Treat Bl | Contra Costa | 21 | 15 | 0 | 2 |
| 4 | N Broadway & Ygnacio Valley Rd | Contra Costa | 19 | 15 | 0 | 4 |
| 5 | N Main St & Parkside Dr | Contra Costa | 18 | 15 | 0 | 2 |
| 6 | Geary Rd & N Main St | Contra Costa | 17 | 8 | 0 | 4 |
| 7 | Civic Dr & Ygnacio Valley Rd | Contra Costa | 15 | 10 | 2 | 5 |
| 8 | Via Monte & Ygnacio Valley Rd | Contra Costa | 14 | 14 | 0 | 1 |
| 9 | Alpine Rd & Olympic Bl | Contra Costa | 13 | 13 | 0 | none reported yet |
| 10 | N California Bl & Ygnacio Valley Rd | Contra Costa | 13 | 11 | 0 | 3 |
| 11 | Lennon Ln & Ygnacio Valley Rd | Contra Costa | 11 | 10 | 1 | none reported yet |
| 12 | Walnut Bl & Ygnacio Valley Rd | Contra Costa | 11 | 8 | 0 | 5 |
| 13 | Wiget Ln & Ygnacio Valley Rd | Contra Costa | 10 | 8 | 0 | 1 |
| 14 | Newell Av & S Main St | Contra Costa | 10 | 7 | 0 | 2 |
| 15 | Lawrence Wy & Parkside Dr | Contra Costa | 10 | 6 | 0 | 3 |
| 16 | N Main St & Ygnacio Valley Rd | Contra Costa | 10 | 5 | 0 | 4 |
This ranking covers 2023–2025. The 2026 figures are separate. They run from January to August 2026 — every whole month the state has published so far — and they are not part of the ranking or of any total above. Police agencies file at different speeds, so putting a part-reported year in a ranking would order agencies by how fast they file rather than roads by how often they are hit.
Recent months are still filling in, so treat them as a floor rather than a count. August 2026 held about 48% of what that month averaged across 2023–2025 when this data was compiled, so its real total will be higher. September 2026 is left out entirely: the state's file stops on 2026-09-01, so that month holds 15 records — a part of a month rather than a month that is late being filed.
Reporting runs at different speeds from one police department to the next, so this matters more than the statewide figure: Walnut Creek has filed 476 crashes for January–August 2026, against about 501 predicted by the same 2023–2025 crash rate — roughly 95%. So "none reported yet" in the 2026 column means no report has arrived for that junction, which is not the same as no crash happening there.
Sources: California Crash Reporting System (CCRS), California Highway Patrol; locations from the US Census Geocoder, each confirmed by a second independent source to within 50 metres. Method and limitations: methodology.