Iowa Clearance Percentages for Major Crimes by County (2007)

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County Murder Rape Robbery Assault Burglary Larceny Vehicle Theft All
Adair nr nr nr 67% 0%(a) 2% 0%(a) 8%
Adams nr nr nr 73% 3% 0% 50% 17%
Allamakee nr nr nr 0%(a) 0%(a) 0%(b) nr 0%(b)
Appanoose nr 25% 100% 54% 7% 13% 17% 24%
Audubon nr 0%(a) nr 21% 0%(b) 5% 0%(a) 8%
Benton nr 60% 100% 78% 13% 15% 57% 37%
Black Hawk 80% 39% 31% 55% 13% 23% 20% 31%
Boone 0%(a) 14% 0%(a) 12% 2% 1% 7% 6%
Bremer nr 40% 50% 84% 14% 25% 57% 53%
Buchanan nr nr 0%(a) 53% 9% 9% 40% 25%
Buena Vista nr 0%(a) 100% 66% 15% 17% 25% 37%
Butler nr nr nr 88% 15% 0%(b) 0%(a) 20%
Calhoun nr 100% nr 29% 4% 1% 0%(a) 9%
Carroll 0%(a) 33% nr 62% 15% 18% 13% 29%
Cass nr 0%(a) nr 56% 21% 19% 25% 29%
Cedar nr 0%(a) 100% 100% 0%(a) 15% 100% 47%
Cerro Gordo nr 50% 50% 79% 12% 32% 23% 39%
Cherokee nr nr nr 92% 25% 33% 50% 63%
Chickasaw nr 0%(a) nr 15% 5% 0% 20% 6%
Clarke nr 0%(a) nr 48% 6% 8% 13% 17%
Clay nr 0%(a) 100% 60% 16% 18% 42% 30%
Clayton nr nr nr 3% 0%(c) 4% 0%(a) 2%
Clinton nr 18% 42% 54% 20% 18% 28% 30%
Crawford nr nr 100% 91% 6% 65% 25% 66%
Dallas nr 17% nr 56% 19% 11% 21% 29%
Davis nr 50% nr 74% 60% 86% nr 73%
Decatur nr nr nr 55% 0%(a) 2% 25% 19%
Delaware nr 83% nr 93% 31% 31% 86% 62%
Des Moines nr 6% 9% 67% 11% 23% 15% 32%
Dickinson nr 50% nr 76% 16% 23% nr 32%
Dubuque 100% 36% 26% 45% 5% 13% 9% 23%
Emmet nr 0%(a) nr 30% 9% 3% 0%(a) 14%
Fayette nr 67% 67% 29% 18% 1% 27% 18%
Floyd nr nr nr 71% 13% 15% 30% 37%
Franklin nr nr 0%(a) 71% 0%(b) 16% 0%(a) 26%
Fremont nr nr nr nr nr nr nr nr
Greene nr nr nr 75% 25% 18% 100% 50%
Grundy nr nr nr 52% 20% 28% 25% 32%
Guthrie 100% nr nr 0%(a) 0%(b) 0%(b) 0%(a) 5%
Hamilton 0%(a) 0%(a) 0%(a) 73% 10% 16% 21% 30%
Hancock nr 100% nr 71% 11% 10% 100% 27%
Hardin nr 25% nr 79% 10% 13% 25% 29%
Harrison nr 0%(a) nr 36% 1% 8% 0%(b) 12%
Henry nr 100% nr 81% 14% 20% 25% 37%
Howard nr 0%(a) nr 89% 12% 14% 20% 22%
Humboldt nr nr 0%(a) 100% 10% 15% 20% 27%
Ida nr nr 0%(a) 68% 7% 10% 33% 25%
Iowa nr 0%(a) nr 46% 14% 19% 75% 25%
Jackson nr 50% nr 66% 20% 15% 60% 39%
Jasper 100% 0%(a) 50% 49% 17% 14% 13% 24%
Jefferson nr 40% 100% 50% 13% 12% 8% 26%
Johnson nr 11% 32% 56% 12% 28% 23% 34%
Jones nr nr nr 52% 8% 13% 0%(b) 22%
Keokuk nr nr nr nr nr 6% nr 6%
Kossuth nr 0%(a) nr 92% 31% 25% 67% 52%
Lee nr 67% 33% 83% 16% 20% 27% 39%
Linn 67% 10% 28% 68% 8% 20% 20% 30%
Louisa nr 0%(a) nr 86% 3% 17% 38% 35%
Lucas nr 0%(a) 0%(a) 73% 8% 11% 25% 26%
Lyon nr 100% nr 63% 33% 19% 33% 41%
Madison nr 0%(a) 100% 48% 19% 7% 43% 23%
Mahaska nr 50% 100% 84% 15% 18% 26% 44%
Marion nr 11% nr 51% 24% 17% 14% 27%
Marshall nr 0%(a) 13% 77% 11% 17% 30% 30%
Mills nr 0%(a) 0%(a) 35% 7% 6% 14% 16%
Mitchell nr nr nr 83% 5% 14% 50% 26%
Monona nr nr nr 0%(a) nr nr 50% 33%
Monroe nr 0%(a) nr 66% 0%(b) 11% 0%(a) 24%
Montgomery nr 80% 100% 93% 25% 23% 17% 50%
Muscatine 50% 48% 40% 75% 13% 24% 28% 35%
O’Brien nr 0%(a) nr 81% 16% 25% 33% 35%
Osceola nr nr nr 94% 75% 83% 0%(a) 85%
Page nr 0%(a) 0%(a) 38% 3% 9% 7% 15%
Palo Alto nr nr nr 69% 15% 9% 20% 28%
Plymouth nr 50% nr 40% 11% 19% 27% 29%
Pocahontas nr 100% nr 100% 22% 18% 100% 38%
Polk 100% 30% 25% 56% 11% 16% 11% 27%
Pottawattamie 33% 14% 28% 57% 7% 16% 9% 21%
Poweshiek nr 22% 0%(a) 46% 12% 12% 21% 20%
Ringgold nr nr nr nr nr nr nr nr
Sac nr nr nr 64% 24% 10% 0%(a) 21%
Scott 33% 18% 24% 52% 15% 19% 17% 28%
Shelby nr nr nr nr nr nr nr nr
Sioux nr 0%(a) 0%(a) 36% 17% 17% 40% 24%
Story 50% 4% 35% 51% 5% 14% 14% 20%
Tama nr nr nr 58% 3% 11% 25% 20%
Taylor nr nr nr 100% 0%(b) 0%(b) nr 7%
Union nr 50% 0%(a) 21% 0% 2% 12% 6%
Van Buren nr nr nr 62% 5% 4% 0%(a) 15%
Wapello nr 6% 17% 68% 4% 18% 16% 26%
Warren 100% 27% 0%(a) 52% 13% 14% 22% 28%
Washington nr 33% nr 33% 3% 7% 0%(a) 11%
Wayne nr 100% nr 100% 6% 9% 38% 40%
Webster nr 11% 21% 54% 6% 13% 11% 20%
Winnebago nr nr nr 68% 33% 67% 50% 62%
Winneshiek nr nr nr 94% 44% 13% 36% 36%
Woodbury 50% 20% 18% 44% 11% 22% 5% 28%
Worth nr nr nr 44% 13% 7% 50% 18%
Wright nr 0%(a) nr 63% 3% 13% 33% 32%

 

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Notes:

a: 1 to 10 reported crimes

b: 11 to 20 reported crimes

c: 21 to 30 reported crimes

d: 31 to 40 reported crimes

nr: no crimes reported

The data set used for this presentation (see below) is consisent with but may differ in part from other data sets provided by the Uniform Crime Reporting Program and used for other presentations in this series.

Clearance Percentage: The percentage of known or reported crimes cleared by arrest. The percentage is determined by dividing the number of arrests for a specific offense by the number of offenses reported to police. Blank cells indicate that no offenses in this category were reported to police. A zero percentage (0%) indicates that none of the reported offenses were cleared by an arrest.

Reported Crimes: The number of known crimes reported to police. The number of these crimes cleared by arrest is represented by the Clearance Percentage, calculated by dividing the number of reported crimes by the number of crimes cleared by an arrest, and is provided in a separate table.

All: Refers to all of the seven major crimes in the table: murder, rape, robbery, assault, burglary, larceny, and vehicle thef (see below)t.

Description of Source Data: “The . . . dataset is a compilation of offenses reported to law enforcement agencies in the United States. Due to the vast number of categoriesof crime committed in the U.S., the FBI has limited the type of crimes includedin this compilationto those crimes which people are most likely to report to police and those crimeswhich occur frequentlyenough to be analyzed across time. Crimes included are criminal homicide, forcible rape, robbery, aggravated assault, burglary, larceny-theft, and motor vehicle theft. Much informationabout these crimes is provided in this dataset. The number oftimes an offense has been reported, the number of reported offenses that havebeen cleared byarrests . . . [are] major items of information collected.” Federal Bureau of Investigation, US Departmentof Justice.

Source: Uniform Crime Reporting Program Data – Offenses Known and Clearances by Arrest

More Information on Source Data