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Marin County
| Measures, data | 2009 | 2010 |
|---|---|---|
| Total adult population in prison (number) as of December 31 | 451 | 420 |
| Imprisonments per 1,000 annual adult felony arrests | 298.5 | 260.4 |
| 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 | 71% | 64% |
| County imprisonments if rate equaled state average, projected (number) | 631 | 657 |
| County actual imprisonments minus projected imprisonments at average state rate (number) | -180 | -237 |
| Costs added (saved) from excessive (lower) imprisonments (millions of dollars/year) | -$8.5 | -$10.8 |
| County imprisonment rates in state prisons | ||
| Men imprisoned per 1,000 male felony arrests | 368.6 | 333.6 |
| Women imprisoned per 1,000 female felony arrests | 65.7 | 37.6 |
| Total adult imprisonments per 100,000/population age 18-69 | 270.8 | 244.1 |
| Men imprisoned per 100,000 males age 18-69 | 510.1 | 473.3 |
| Women imprisoned per 100,000 females age 18-69 | 27.8 | 17.3 |
| County imprisonment rates in state prisons by offense | ||
| Imprisonments for violent offenses per 1,000 violent felony arrests | 567.1 | 515.9 |
| Imprisonments for property offenses per 1,000 property felony arrests | 267.6 | 214.8 |
| Imprisonments for drug offenses per 1,000 drug felony arrests | 111.9 | 102.6 |
| Imprisonments for violent offenses per 100,000 population | 95.9 | 96.7 |
| Imprisonments for property offenses per 100,000 population | 43.8 | 38.0 |
| Imprisonments for drug offenses per 100,000 population | 18.7 | 17.0 |
| Imprisonments for drug possession offenses per 100,000 population | 6.4 | 5.9 |
| Imprisonments for marijuana offenses per 100,000 population | 1.2 | 0.4 |
| Imprisonments for strike offenses per 100,000 population | 45.4 | 43.6 |
| Imprisonments for 3rd strikes per 100,000 population | 19.1 | 19.0 |
| Imprisonments for 2nd strikes per 100,000 population | 26.3 | 24.6 |
| Change in imprisonment rates per adult felony arrest compared to 2009 | N/A | -13% |
| County new felon admissions to state prisons | ||
| New felon admissions to prison by race/ethnicity, all races | 119 | 118 |
| New felon admissions per 1,000 adult felony arrests | 78.8 | 73.2 |
| New felon admissions, statewide average | 156.0 | 148.7 |
| New felon admissions per 1,000 felonies as a percent of the state average (=100%) | 50% | 49% |
| New felon admissions per 100,000 population, all races | 47.4 | 46.7 |
| White, not Latino, new felon admissions per 100,000 whites | N/A | 27.2 |
| Latino new felon admissions per 100,000 Latinos | N/A | 56.3 |
| Black new felon admissions per 100,000 African Americans | N/A | 573.9 |
| Asian/other new felon admissions per 100,000 Asian/other population | N/A | 35.0 |
| County adult jail incarceration rates | ||
| County adult jail incarcerations, average daily population, December | 267 | 288 |
| Percent of jail population that is unsentenced | 78% | 81% |
| County jail populations per 1,000 adult felony arrests | 176.7 | 178.5 |
| 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%) | 95% | 101% |
| Men jailed per 1,000 male felony arrests | 205.9 | 210.9 |
| Women jailed per 1,000 female felony arrests | 80.0 | 80.2 |
| County jail populations per 100,000 population age 18-69 | 160.3 | 167.4 |
| Men jailed per 100,000 males age 18-69 | 284.8 | 299.2 |
| Women jailed per 100,000 females age 18-69 | 33.9 | 37.0 |
| County total adult incarcerations (state prisons + local jails) as of December | ||
| Total adult population incarcerated | 718 | 708 |
| Total adult incarceration rate per 1,000 adult felony arrests | 475.2 | 438.9 |
| Total incarceration rate, state average | 604.3 | 583.5 |
| Total adult incarceration rate as a percent of the state average (=100%) | 79% | 75% |
| Total adult male incarceration rate per 1,000 adult male felony arrests | 574.5 | 544.5 |
| Total adult female incarceration rate per 1,000 adult female felony arrests | 145.7 | 117.8 |
| Total adult male incarceration rate per 100,000 males age 18-69 | 795.0 | 772.5 |
| Total adult female incarceration rate per 100,000 females age 18-69 | 61.7 | 54.4 |
| Percent of incarcerated adult population held locally | 37% | 41% |
| Raw numbers, county prisoners in state prisons | ||
| Men imprisoned | 428 | 405 |
| Women imprisoned | 23 | 15 |
| Imprisonments for violent felonies | 241 | 244 |
| Imprisonments for property felonies | 110 | 96 |
| Imprisonments for drug felonies | 47 | 43 |
| Imprisonments for drug possession offenses | 16 | 15 |
| Imprisonments for marijuana offenses | 3 | 1 |
| Imprisonments for strike offenses | 114 | 110 |
| Imprisonments for 3rd strikes | 48 | 48 |
| Imprisonments for 2nd strikes | 66 | 62 |
| Raw numbers, county new felon admissions to state prisons, calendar year | ||
| New felon admissions to prison, White, not Latino | N/A | 50 |
| New felon admissions to prison, Latino | N/A | 22 |
| New felon admissions to prison, Black | N/A | 38 |
| New felon admissions to prison, Asian/all other | N/A | 8 |
| Raw numbers, county jail incarcerations, ADP as of December | N/A | N/A |
| Jailed, unsentenced | 209 | 233 |
| Jailed, sentenced | 58 | 55 |
| Men jailed | 239 | 256 |
| Women jailed | 28 | 32 |
| Raw numbers, total county incarcerations (state prison + local jails) | N/A | N/A |
| Total incarcerated (state prison + local jails), adult males | 667 | 661 |
| Total incarcerated (state prison + local jails), adult females | 51 | 47 |
| County crime rates and adult arrest rates | ||
| Part I crime rate per 100,000 population (offenses reported to police) | 1,436.5 | 1,414.0 |
| Violent crime rate per 100,000 population | 208.6 | 206.0 |
| Property crime rate per 100,000 population | 1,228.0 | 1,208.0 |
| Adult felony arrest rate per 100,000 population age 18-69 | 907.4 | 937.6 |
| Violent crime arrest rate | 255.2 | 274.9 |
| Property crime arrest rate | 246.8 | 259.8 |
| Drug offense arrest rate | 252.2 | 243.5 |
| Male felony arrest rate | 1,383.7 | 1,418.8 |
| Female felony arrest rate | 423.7 | 461.4 |
| Raw numbers, county crimes reported to police, adult felony arrests, and populations | ||
| Part I crimes reported to police (number) | 3,609 | 3,569 |
| Violent crimes reported | 524 | 520 |
| Property crimes reported | 3,085 | 3,049 |
| Adult felony arrests, total (number) | 1,511 | 1,613 |
| Violent felony arrests | 425 | 473 |
| Property felony arrests | 411 | 447 |
| Drug felony arrests | 420 | 419 |
| Male felony arrests | 1,161 | 1,214 |
| Female felony arrests | 350 | 399 |
| Total county population, all ages (number) | 251,230 | 252,409 |
| White, not Latino population | N/A | 183,830 |
| Latino population | N/A | 39,069 |
| Black population | N/A | 6,621 |
| Asian/other population | N/A | 22,889 |
| Total adult population, age 18-69 | 166,514 | 172,040 |
| Male population, age 18-69 | 83,904 | 85,567 |
| Female population, age 18-69 | 82,610 | 86,473 |
| 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.