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Alameda County
| Measures, data | 2009 | 2010 |
|---|---|---|
| Total adult population in prison (number) as of December 31 | 4,542 | 4,271 |
| Imprisonments per 1,000 annual adult felony arrests | 284.1 | 284.9 |
| 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 | 68% | 70% |
| County imprisonments if rate equaled state average, projected (number) | 6,678 | 6,102 |
| County actual imprisonments minus projected imprisonments at average state rate (number) | -2,136 | -1,831 |
| Costs added (saved) from excessive (lower) imprisonments (millions of dollars/year) | -$100.6 | -$83.9 |
| County imprisonment rates in state prisons | ||
| Men imprisoned per 1,000 male felony arrests | 339.7 | 342.2 |
| Women imprisoned per 1,000 female felony arrests | 55.0 | 52.3 |
| Total adult imprisonments per 100,000/population age 18-69 | 456.1 | 405.0 |
| Men imprisoned per 100,000 males age 18-69 | 870.9 | 793.0 |
| Women imprisoned per 100,000 females age 18-69 | 34.8 | 28.9 |
| County imprisonment rates in state prisons by offense | ||
| Imprisonments for violent offenses per 1,000 violent felony arrests | 927.8 | 1,065.0 |
| Imprisonments for property offenses per 1,000 property felony arrests | 174.8 | 157.3 |
| Imprisonments for drug offenses per 1,000 drug felony arrests | 92.4 | 70.0 |
| Imprisonments for violent offenses per 100,000 population | 211.9 | 216.9 |
| Imprisonments for property offenses per 100,000 population | 43.2 | 36.9 |
| Imprisonments for drug offenses per 100,000 population | 33.3 | 23.8 |
| Imprisonments for drug possession offenses per 100,000 population | 6.3 | 4.8 |
| Imprisonments for marijuana offenses per 100,000 population | 2.6 | 1.7 |
| Imprisonments for strike offenses per 100,000 population | 39.4 | 40.7 |
| Imprisonments for 3rd strikes per 100,000 population | 8.8 | 9.1 |
| Imprisonments for 2nd strikes per 100,000 population | 30.6 | 31.6 |
| Change in imprisonment rates per adult felony arrest compared to 2009 | N/A | 0% |
| County new felon admissions to state prisons | ||
| New felon admissions to prison by race/ethnicity, all races | 1,213 | 1,249 |
| New felon admissions per 1,000 adult felony arrests | 75.9 | 83.3 |
| New felon admissions, statewide average | 156.0 | 148.7 |
| New felon admissions per 1,000 felonies as a percent of the state average (=100%) | 49% | 56% |
| New felon admissions per 100,000 population, all races | 80.7 | 82.7 |
| White, not Latino, new felon admissions per 100,000 whites | N/A | 24.3 |
| Latino new felon admissions per 100,000 Latinos | N/A | 68.3 |
| Black new felon admissions per 100,000 African Americans | N/A | 438.8 |
| Asian/other new felon admissions per 100,000 Asian/other population | N/A | 17.8 |
| County adult jail incarceration rates | ||
| County adult jail incarcerations, average daily population, December | 4,182 | 3,821 |
| Percent of jail population that is unsentenced | 83% | 84% |
| County jail populations per 1,000 adult felony arrests | 261.5 | 254.9 |
| 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%) | 140% | 144% |
| Men jailed per 1,000 male felony arrests | 296.9 | 292.5 |
| Women jailed per 1,000 female felony arrests | 116.2 | 102.3 |
| County jail populations per 100,000 population age 18-69 | 420.0 | 362.3 |
| Men jailed per 100,000 males age 18-69 | 761.1 | 677.8 |
| Women jailed per 100,000 females age 18-69 | 73.5 | 56.6 |
| County total adult incarcerations (state prisons + local jails) as of December | ||
| Total adult population incarcerated | 8,724 | 8,092 |
| Total adult incarceration rate per 1,000 adult felony arrests | 545.6 | 539.8 |
| Total incarceration rate, state average | 604.3 | 583.5 |
| Total adult incarceration rate as a percent of the state average (=100%) | 90% | 93% |
| Total adult male incarceration rate per 1,000 adult male felony arrests | 636.5 | 634.6 |
| Total adult female incarceration rate per 1,000 adult female felony arrests | 171.2 | 154.6 |
| Total adult male incarceration rate per 100,000 males age 18-69 | 1,632.0 | 1,470.9 |
| Total adult female incarceration rate per 100,000 females age 18-69 | 108.3 | 85.5 |
| Percent of incarcerated adult population held locally | 48% | 47% |
| Raw numbers, county prisoners in state prisons | ||
| Men imprisoned | 4,370 | 4,116 |
| Women imprisoned | 172 | 155 |
| Imprisonments for violent felonies | 3,187 | 3,276 |
| Imprisonments for property felonies | 650 | 558 |
| Imprisonments for drug felonies | 501 | 359 |
| Imprisonments for drug possession offenses | 94 | 72 |
| Imprisonments for marijuana offenses | 39 | 25 |
| Imprisonments for strike offenses | 592 | 615 |
| Imprisonments for 3rd strikes | 132 | 138 |
| Imprisonments for 2nd strikes | 460 | 477 |
| Raw numbers, county new felon admissions to state prisons, calendar year | ||
| New felon admissions to prison, White, not Latino | N/A | 125 |
| New felon admissions to prison, Latino | N/A | 232 |
| New felon admissions to prison, Black | N/A | 808 |
| New felon admissions to prison, Asian/all other | N/A | 84 |
| Raw numbers, county jail incarcerations, ADP as of December | N/A | N/A |
| Jailed, unsentenced | 3,464 | 3,201 |
| Jailed, sentenced | 718 | 620 |
| Men jailed | 3,819 | 3,518 |
| Women jailed | 363 | 303 |
| Raw numbers, total county incarcerations (state prison + local jails) | N/A | N/A |
| Total incarcerated (state prison + local jails), adult males | 8,189 | 7,634 |
| Total incarcerated (state prison + local jails), adult females | 535 | 458 |
| County crime rates and adult arrest rates | ||
| Part I crime rate per 100,000 population (offenses reported to police) | 2,964.7 | 2,709.9 |
| Violent crime rate per 100,000 population | 744.0 | 693.1 |
| Property crime rate per 100,000 population | 2,220.7 | 2,016.8 |
| Adult felony arrest rate per 100,000 population age 18-69 | 1,605.7 | 1,421.5 |
| Violent crime arrest rate | 344.9 | 291.7 |
| Property crime arrest rate | 373.5 | 336.3 |
| Drug offense arrest rate | 544.7 | 486.0 |
| Male felony arrest rate | 2,563.9 | 2,317.7 |
| Female felony arrest rate | 632.6 | 553.1 |
| Raw numbers, county crimes reported to police, adult felony arrests, and populations | ||
| Part I crimes reported to police (number) | 44,584 | 40,927 |
| Violent crimes reported | 11,189 | 10,468 |
| Property crimes reported | 33,395 | 30,459 |
| Adult felony arrests, total (number) | 15,990 | 14,991 |
| Violent felony arrests | 3,435 | 3,076 |
| Property felony arrests | 3,719 | 3,547 |
| Drug felony arrests | 5,424 | 5,125 |
| Male felony arrests | 12,865 | 12,029 |
| Female felony arrests | 3,125 | 2,962 |
| Total county population, all ages (number) | 1,503,827 | 1,510,271 |
| White, not Latino population | N/A | 514,559 |
| Latino population | N/A | 339,889 |
| Black population | N/A | 184,126 |
| Asian/other population | N/A | 471,697 |
| Total adult population, age 18-69 | 995,802 | 1,054,567 |
| Male population, age 18-69 | 501,772 | 519,017 |
| Female population, age 18-69 | 494,030 | 535,550 |
| At Legislative Analyst-estimated cost per prisoner per year | $47,102 | $45,828 |
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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.