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Home • Crime in the U.S. • 2013 • Crime in the U.S. 2013 • Tables • Table 31 • Table 31 Data Declaration

Table 31 Data Declaration

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Number and Rate of Arrests by Population Group, 2013

The FBI collects these data through the Uniform Crime Reporting (UCR) Program.

Important note about rape data

In 2013, the FBI UCR Program initiated the collection of rape data within the Summary Reporting System under a revised definition. The term “forcible” was removed from the offense name, and the definition changed to the revised UCR definition below.

Legacy UCR definition of rape:  The carnal knowledge of a female forcibly and against her will.

Revised UCR definition of rape:  Penetration, no matter how slight, of the vagina or anus with any body part or object, or oral penetration by a sex organ of another person, without the consent of the victim.

The rape figures in this table are aggregate totals of arrest data submitted using both the legacy and revised UCR definitions of rape.

General comments

  • This table provides the number of persons arrested and the arrest rate per 100,000 inhabitants for the eight UCR population groups (see below), U.S. cities collectively, and for the nation in 2013.
  • These data represent the number of persons arrested; however, some persons may be arrested more than once during a year. Therefore, the statistics in this table could, in some cases, represent multiple arrests of the same person.
  • The data used in creating this table were from all law enforcement agencies submitting 12 months of arrest data for 2013.
  • The FBI derived the arrest rates by first dividing the total aggregated arrests by the aggregated populations covered by contributing agencies and then multiplying the resulting figure by 100,000.

Methodology

  • The data used in creating this table were from all law enforcement agencies submitting 12 months of arrest data for 2013.
  • The FBI derived the arrest rates by first dividing the total aggregated arrests by the aggregated populations covered by contributing agencies and then multiplying the resulting figure by 100,000.

Population groups

The UCR Program uses the following population group designations:

Population Group

Political Label

Population Range

I

City

250,000 and more

II

City

100,000 to 249,999

III

City

50,000 to 99,999

IV

City

25,000 to 49,999

V

City

10,000 to 24,999

VI1, 2

City

Less than 10,000

VIII (Nonmetropolitan County) 2

County

N/A

IX (Metropolitan County) 2

County

N/A

1Includes universities and colleges to which no population is attributed.
2Includes state police to which no population is attributed.

Population estimation

For the 2013 population estimates used in this table, the FBI computed individual rates of growth from one year to the next for every city/town and county using 2010 decennial population counts and 2011 through 2012 population estimates from the U.S. Census Bureau. Each agency’s rates of growth were averaged; that average was then applied and added to its 2012 Census population estimate to derive the agency’s 2013 population estimate.