- Juvenile Justice
- Criminal Justice
- Technical Assistance
- Overview
- Sentencing Service Program
- California Sentencing Institute
- Alameda County
- Alpine County
- Amador County
- Butte County
- Calaveras County
- Colusa County
- Contra Costa County
- Del Norte County
- El Dorado County
- Fresno County
- Glenn County
- Humboldt County
- Imperial County
- Inyo County
- Kern County
- Kings County
- Lake County
- Lassen County
- Los Angeles County
- Madera County
- Marin County
- Mariposa County
- Mendocino County
- Merced County
- Modoc County
- Mono County
- Monterey County
- Napa County
- Nevada County
- Orange County
- Placer County
- Plumas County
- Riverside County
- Sacramento County
- San Benito County
- San Bernardino County
- San Diego County
- San Francisco County
- San Joaquin County
- San Luis Obispo County
- San Mateo County
- Santa Barbara County
- Santa Clara County
- Santa Cruz County
- Shasta County
- Sierra County
- Siskiyou County
- Solano County
- Sonoma County
- Stanislaus County
- Sutter County
- Tehema County
- Trinity County
- Tulare County
- Tuolumne County
- Ventura County
- Yolo County
- Yuba County
- California Juvenile Justice Reentry Institute
- CJCJ Blog
- Resource Center
Contra Costa County
| Measures, data | 2009 | 2010 |
|---|---|---|
| Total adult population in prison (number) as of December 31 | 1,942 | 1,882 |
| Imprisonments per 1,000 annual adult felony arrests | 187.7 | 179.1 |
| State imprisonment rate per 1,000 adult felony arrests (average) | 417.7 | 407.1 |
| County imprisonment rate as percent of state average (=100%), arrest based | 45% | 44% |
| County imprisonments if rate equaled state average, projected (number) | 4,321 | 4,278 |
| County actual imprisonments minus projected imprisonments at average state rate (number) | -2,379 | -2,396 |
| Costs added (saved) from excessive (lower) imprisonments (millions of dollars/year) | -$112.0 | -$109.8 |
| County imprisonment rates in state prisons | ||
| Men imprisoned per 1,000 male felony arrests | 233.7 | 221.3 |
| Women imprisoned per 1,000 female felony arrests | 26.9 | 26.0 |
| Total adult imprisonments per 100,000/population age 18-69 | 284.8 | 269.1 |
| Men imprisoned per 100,000 males age 18-69 | 547.2 | 534.1 |
| Women imprisoned per 100,000 females age 18-69 | 18.3 | 16.5 |
| County imprisonment rates in state prisons by offense | ||
| Imprisonments for violent offenses per 1,000 violent felony arrests | 568.1 | 623.6 |
| Imprisonments for property offenses per 1,000 property felony arrests | 102.7 | 94.1 |
| Imprisonments for drug offenses per 1,000 drug felony arrests | 41.5 | 30.6 |
| Imprisonments for violent offenses per 100,000 population | 134.3 | 138.5 |
| Imprisonments for property offenses per 100,000 population | 29.6 | 27.6 |
| Imprisonments for drug offenses per 100,000 population | 10.9 | 9.2 |
| Imprisonments for drug possession offenses per 100,000 population | 1.4 | 1.3 |
| Imprisonments for marijuana offenses per 100,000 population | 0.2 | 0.5 |
| Imprisonments for strike offenses per 100,000 population | 30.9 | 30.1 |
| Imprisonments for 3rd strikes per 100,000 population | 8.3 | 8.5 |
| Imprisonments for 2nd strikes per 100,000 population | 22.5 | 21.6 |
| Change in imprisonment rates per adult felony arrest compared to 2009 | N/A | -5% |
| County new felon admissions to state prisons | ||
| New felon admissions to prison by race/ethnicity, all races | 517 | 467 |
| New felon admissions per 1,000 adult felony arrests | 50.0 | 44.4 |
| New felon admissions, statewide average | 156.0 | 148.7 |
| New felon admissions per 1,000 felonies as a percent of the state average (=100%) | 32% | 30% |
| New felon admissions per 100,000 population, all races | 49.5 | 44.5 |
| White, not Latino, new felon admissions per 100,000 whites | N/A | 25.6 |
| Latino new felon admissions per 100,000 Latinos | N/A | 46.6 |
| Black new felon admissions per 100,000 African Americans | N/A | 204.1 |
| Asian/other new felon admissions per 100,000 Asian/other population | N/A | 14.6 |
| County adult jail incarceration rates | ||
| County adult jail incarcerations, average daily population, December | 1,450 | 1,577 |
| Percent of jail population that is unsentenced | 78% | 87% |
| County jail populations per 1,000 adult felony arrests | 140.2 | 150.1 |
| Jail incarceration rate, state average | 186.6 | 176.5 |
| County jail incarceration rate per 1,000 felony arrests as a percent of the state average (=100%) | 75% | 85% |
| Men jailed per 1,000 male felony arrests | 154.3 | 166.9 |
| Women jailed per 1,000 female felony arrests | 90.8 | 89.0 |
| County jail populations per 100,000 population age 18-69 | 212.7 | 225.5 |
| Men jailed per 100,000 males age 18-69 | 361.2 | 402.9 |
| Women jailed per 100,000 females age 18-69 | 61.8 | 56.4 |
| County total adult incarcerations (state prisons + local jails) as of December | ||
| Total adult population incarcerated | 3,392 | 3,459 |
| Total adult incarceration rate per 1,000 adult felony arrests | 327.9 | 329.1 |
| Total incarceration rate, state average | 604.3 | 583.5 |
| Total adult incarceration rate as a percent of the state average (=100%) | 54% | 56% |
| Total adult male incarceration rate per 1,000 adult male felony arrests | 388.0 | 388.2 |
| Total adult female incarceration rate per 1,000 adult female felony arrests | 117.8 | 115.0 |
| Total adult male incarceration rate per 100,000 males age 18-69 | 908.4 | 937.0 |
| Total adult female incarceration rate per 100,000 females age 18-69 | 80.1 | 72.9 |
| Percent of incarcerated adult population held locally | 43% | 46% |
| Raw numbers, county prisoners in state prisons | ||
| Men imprisoned | 1,880 | 1,823 |
| Women imprisoned | 62 | 59 |
| Imprisonments for violent felonies | 1,401 | 1,453 |
| Imprisonments for property felonies | 309 | 290 |
| Imprisonments for drug felonies | 114 | 97 |
| Imprisonments for drug possession offenses | 15 | 14 |
| Imprisonments for marijuana offenses | 2 | 5 |
| Imprisonments for strike offenses | 322 | 316 |
| Imprisonments for 3rd strikes | 87 | 89 |
| Imprisonments for 2nd strikes | 235 | 227 |
| Raw numbers, county new felon admissions to state prisons, calendar year | ||
| New felon admissions to prison, White, not Latino | N/A | 128 |
| New felon admissions to prison, Latino | N/A | 119 |
| New felon admissions to prison, Black | N/A | 191 |
| New felon admissions to prison, Asian/all other | N/A | 29 |
| Raw numbers, county jail incarcerations, ADP as of December | N/A | N/A |
| Jailed, unsentenced | 1,124 | 1,366 |
| Jailed, sentenced | 326 | 211 |
| Men jailed | 1,241 | 1,375 |
| Women jailed | 209 | 202 |
| Raw numbers, total county incarcerations (state prison + local jails) | N/A | N/A |
| Total incarcerated (state prison + local jails), adult males | 3,121 | 3,198 |
| Total incarcerated (state prison + local jails), adult females | 271 | 261 |
| County crime rates and adult arrest rates | ||
| Part I crime rate per 100,000 population (offenses reported to police) | 2,309.5 | 2,313.2 |
| Violent crime rate per 100,000 population | 408.0 | 412.4 |
| Property crime rate per 100,000 population | 1,901.6 | 1,900.8 |
| Adult felony arrest rate per 100,000 population age 18-69 | 1,517.3 | 1,502.7 |
| Violent crime arrest rate | 361.7 | 333.2 |
| Property crime arrest rate | 441.5 | 440.8 |
| Drug offense arrest rate | 403.2 | 452.6 |
| Male felony arrest rate | 2,341.4 | 2,413.9 |
| Female felony arrest rate | 680.3 | 634.0 |
| Raw numbers, county crimes reported to police, adult felony arrests, and populations | ||
| Part I crimes reported to police (number) | 24,100 | 24,266 |
| Violent crimes reported | 4,257 | 4,326 |
| Property crimes reported | 19,843 | 19,940 |
| Adult felony arrests, total (number) | 10,345 | 10,509 |
| Violent felony arrests | 2,466 | 2,330 |
| Property felony arrests | 3,010 | 3,083 |
| Drug felony arrests | 2,749 | 3,165 |
| Male felony arrests | 8,044 | 8,239 |
| Female felony arrests | 2,301 | 2,270 |
| Total county population, all ages (number) | 1,043,501 | 1,049,025 |
| White, not Latino population | N/A | 500,923 |
| Latino population | N/A | 255,560 |
| Black population | N/A | 93,604 |
| Asian/other population | N/A | 198,938 |
| Total adult population, age 18-69 | 681,804 | 699,358 |
| Male population, age 18-69 | 343,552 | 341,317 |
| Female population, age 18-69 | 338,252 | 358,041 |
| At Legislative Analyst-estimated cost per prisoner per year | $47,102 | $45,828 |
Email
PrintCalifornia Sentencing Institute
Current Issues
California Sentencing Institute: Interactive County Map
Go to the California Sentencing Institute and click on the Interactive County Map to view the rates of adult arrests and imprisonments by offense, race, and sex.