|
The 1993 Urban Influence codes divide
the 3,141 counties, county equivalents, and independent cities
in the United States into nine groups. Metro counties are divided into two groups
by the size of the metro area—those in "large" areas with
at least 1 million residents and those in "small" areas with
fewer than 1 million residents. Nonmetro counties are divided
into groups by their adjacency to metro areas—adjacent to a large metro
area, adjacent to a small metro area, and not adjacent to a metro
area. Nonmetro counties adjacent to either size metro area are
further classified by the size of their "own city"—those
containing all or part of a city of 10,000 or more residents and
those containing no part of a city that large. Nonmetro counties not adjacent to
a metro area are divided by the size of the largest place they
contain—those containing all or part of their "own city" of 10,000 or more residents,
those containing all or part of a "town" of 2,500-9,999 residents,
and those containing no part of a town with at least 2,500 residents
(putting the entire county in the Census Bureau's definition of
"rural"). Census-defined places are considered to be cities or
towns in this classification. Virginia's independent cities are
considered in determining the largest city or town in the counties which the
independent cities border. Hawaii's Kalawao County is considered
to have the size of place that island-sharing Maui County, HI,
has, and Montana's Yellowstone National Park is considered to
have the size of place that adjoining Park County has.
| 1993 Urban Influence Codes |
| Code |
Description |
| Metro counties: |
| 1 |
Large—in a metro area with at least 1 million residents
or more. |
| 2 |
Small—in a metro area with fewer than 1 million residents. |
| Nonmetro counties: |
| 3 |
Adjacent to a large metro area and contains a city of at least
10,000 residents. |
| 4 |
Adjacent to a large metro area and does not have a city of
at least 10,000 residents. |
| 5 |
Adjacent to a small metro area and contains a city of at least
10,000 residents. |
| 6 |
Adjacent to a small metro area and does not have a city of
at least 10,000 residents. |
| 7 |
Not adjacent to a metro area and contains a city of at least
10,000 residents. |
| 8 |
Not adjacent to a metro area and contains a town of 2,500-
9,999 residents. |
| 9 |
Not adjacent to a metro area and does not contain a town of
at least 2,500 residents. |
For more information about the urban influence code, see "A
County-Level Measure of Urban Influence" from Rural Development
Perspectives (Adobe Acrobat format).
|
