Slick Nick Law

Crashes by California county

Reviewed by Slick Nick, California licensed attorney · State Bar #324789 · Last updated September 1, 2026

All 58 counties, ranked by reported crashes across 2023 and 2024. Read it as a ranking by size before you read it as a ranking by risk: Los Angeles County accounts for about 26 per cent of the statewide total, which is close to its share of the state's population. Nothing in this table is adjusted for how many people live somewhere or how far they drive.

Reported crashes, people killed and people injured by county, 2023–2024 combined
# County Crashes Killed Injured Pedestrian Bicycle Motorcycle
1 Los Angeles 212,052 1,645 119,102 7,802 4,099 6,023
2 Orange 60,197 446 36,196 1,902 2,242 1,819
3 Riverside 56,188 644 30,707 1,357 852 1,892
4 San Bernardino 53,588 761 29,933 1,272 719 1,640
5 San Diego 50,307 605 38,405 2,160 1,428 3,221
6 Sacramento 40,891 374 23,362 1,314 1,126 1,041
7 Alameda 40,245 220 19,142 1,329 928 1,032
8 Santa Clara 28,409 225 17,531 1,012 954 717
9 San Joaquin 22,511 279 11,937 547 429 469
10 Fresno 21,562 327 10,745 623 365 424
11 Contra Costa 21,359 172 9,772 612 443 518
12 Kern 19,889 392 11,598 616 300 528
13 Ventura 17,400 137 10,731 456 457 541
14 Stanislaus 14,710 180 9,642 447 337 356
15 San Mateo 12,913 72 6,903 490 380 354
16 Tulare 12,683 160 5,937 257 174 229
17 San Francisco 12,227 88 8,566 1,212 700 626
18 Solano 11,272 97 5,462 285 203 298
19 Monterey 9,884 90 4,820 311 179 197
20 Santa Barbara 8,857 75 5,176 263 504 222
21 Merced 8,091 106 4,534 193 118 175
22 Placer 8,065 84 4,600 162 161 272
23 San Luis Obispo 7,851 54 2,959 124 147 194
24 Sonoma 7,637 67 4,788 217 179 271
25 Santa Cruz 6,027 43 2,796 176 247 245
26 Marin 5,242 27 2,660 164 208 197
27 Yolo 4,880 44 2,643 115 182 110
28 Madera 4,471 61 2,195 112 55 103
29 El Dorado 4,301 38 2,078 70 62 208
30 Butte 3,639 71 2,009 126 68 160
31 Kings 3,415 72 1,810 67 52 55
32 Napa 3,304 30 1,727 82 63 123
33 Humboldt 3,181 55 1,419 88 61 79
34 Shasta 3,038 58 1,810 92 50 125
35 Mendocino 2,412 41 907 38 28 99
36 Nevada 2,237 26 1,053 27 16 80
37 Sutter 2,222 44 1,465 66 51 62
38 Yuba 2,208 33 1,168 68 49 82
39 Imperial 2,164 53 1,515 36 20 55
40 Tuolumne 1,852 30 913 27 7 96
41 San Benito 1,615 19 904 39 32 48
42 Lake 1,592 49 859 57 13 70
43 Tehama 1,477 34 768 23 12 59
44 Calaveras 1,257 32 652 14 5 82
45 Siskiyou 1,038 31 559 4 3 22
46 Amador 839 18 478 9 2 56
47 Inyo 710 23 297 10 12 38
48 Lassen 685 10 351 8 2 13
49 Colusa 653 13 338 4 0 8
50 Del Norte 628 11 377 15 14 11
51 Mono 562 7 249 0 1 26
52 Glenn 540 24 333 5 0 12
53 Trinity 502 15 209 6 3 33
54 Mariposa 463 5 229 6 1 22
55 Plumas 459 3 221 9 1 20
56 Modoc 269 6 113 1 1 9
57 Alpine 146 1 110 1 1 12
58 Sierra 135 2 78 1 1 17
Statewide 826,971 8,329 467,854 26,529 18,749 25,496

Reading the table

The gap between the top and the bottom is enormous — Los Angeles County recorded 212,052 crashes over the two years and Sierra County recorded 135. Almost all of that gap is population. Orange County, second on the list, is not second by a small margin.

The killed and injured columns are people, not crashes. A single crash can contribute several to either column, or none. That is why a county can rank higher for deaths than for crashes: rural counties with fast roads tend to record fewer collisions and more severe ones.

The statewide row is slightly larger than the sum of the county rows, because a small number of records carry a county code outside the valid range and are left out of the county breakdown rather than assigned to a county. The methodology gives the exact counts.

Download it

California crash counts by county (CSV) — every county, both years, free and ungated. Citation requested, not required: Slick Nick Law, from CHP CCRS data.

Sources: California Crash Reporting System (CCRS), California Highway Patrol; county codes from California Secretary of State, California County Codes. Definitions and limitations: methodology.

Common questions

Why is Los Angeles County so far ahead?
Because it is far larger than anywhere else in the state. This table ranks by count, not by rate, so it ranks by population and traffic volume as much as by anything else. A county near the top is not necessarily more dangerous per mile driven than one near the bottom.
What does "crashes" count exactly?
One reported crash record in the California Crash Reporting System, for the calendar year shown. Records marked deleted are excluded. It counts crashes, not vehicles and not people.
Why do killed and injured not add up to the number of crashes?
They are different things. A crash can injure several people or none at all. "People killed" and "people injured" are sums of those columns across the crash records, so they can be higher or far lower than the crash count.
Where do the county names come from?
The dataset stores a county code, not a name. The mapping is the state’s own published list of California county codes, checked against the city names in the data before use. The methodology page shows the source and the check.