# Counties in California by school enrolment, children aged 3 and 4, 2024

All 57 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `preschool_enrolment_rate_3_4`
- Unit: %
- Definition: Children aged 3 and 4 enrolled in public or private school, including nursery school and preschool, at any time in the three months before the interview, as a percentage of all children aged 3 and 4. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b14003.dat)
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b14003.dat. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/preschool-enrollment-ages-3-4/california-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Alpine County | 85.7 |
| 2 | San Francisco County | 73.2 |
| 3 | Marin County | 70.7 |
| 4 | San Mateo County | 64.3 |
| 5 | Del Norte County | 62.3 |
| 6 | El Dorado County | 59.9 |
| 7 | Plumas County | 59.5 |
| 8 | Mono County | 58.7 |
| 9 | Santa Clara County | 57 |
| 10 | Tuolumne County | 56.5 |
| 11 | Alameda County | 56.4 |
| 12 | Orange County | 52.9 |
| 13 | Mendocino County | 52.8 |
| 14 | Nevada County | 51.5 |
| 15 | Contra Costa County | 50.1 |
| 16 | San Luis Obispo County | 49.4 |
| 17 | Amador County | 49 |
| 18 | Los Angeles County | 48.3 |
| 19 | San Diego County | 48.2 |
| 20 | Sonoma County | 47 |
| 21 | Yolo County | 46.2 |
| 22 | Santa Cruz County | 45.8 |
| 23 | Santa Barbara County | 45.3 |
| 24 | Napa County | 45.3 |
| 25 | Butte County | 44.9 |
| 26 | Shasta County | 44.9 |
| 27 | Imperial County | 43.3 |
| 28 | Placer County | 42.9 |
| 29 | Humboldt County | 42.6 |
| 30 | Mariposa County | 39.9 |
| 31 | San Benito County | 39.6 |
| 32 | Yuba County | 39.1 |
| 33 | Sacramento County | 38.7 |
| 34 | Madera County | 37.5 |
| 35 | Ventura County | 37.5 |
| 36 | Solano County | 37.4 |
| 37 | Inyo County | 37.1 |
| 38 | Colusa County | 37.1 |
| 39 | San Joaquin County | 36.6 |
| 40 | Calaveras County | 36.5 |
| 41 | Fresno County | 35.7 |
| 42 | Siskiyou County | 35.6 |
| 43 | Stanislaus County | 35.5 |
| 44 | Lake County | 35.2 |
| 45 | Modoc County | 35.1 |
| 46 | Tehama County | 33.4 |
| 47 | Kern County | 32.8 |
| 48 | Tulare County | 32.7 |
| 49 | Monterey County | 32.7 |
| 50 | Sutter County | 32.6 |
| 51 | Riverside County | 32 |
| 52 | San Bernardino County | 31.3 |
| 53 | Merced County | 31.3 |
| 54 | Kings County | 21.2 |
| 55 | Glenn County | 20.8 |
| 56 | Lassen County | 17.5 |
| 57 | Trinity County | 4.7 |