County (United States) - Statistics

Statistics

At the 2000 U.S. Census, the median land area of the 3,077 U.S. counties was 622 sq mi (1,610 km2), which is two-thirds of the median land area of a ceremonial county of England, and a little more than a quarter of the median land area of a French département. However, this figure does not account for the differences among the United States counties themselves; counties in the western United States have a much larger mean land area than those in the eastern United States. For example, the median land area of counties in Georgia is 343 sq mi (890 km2), whereas in Utah it is 2,427 sq mi (6,290 km2).

The largest county equivalent by (total) area is Yukon-Koyukuk Census Area, Alaska, at 147,843 square miles (382,910 km2), while the largest actual county is San Bernardino County, California, in southern California, which includes the Mojave Desert, at 20,105 square miles (52,070 km2) in area. The second-largest county is Coconino County, Arizona, in the north-central part of the state, which includes the Grand Canyon National Park. The smallest county equivalent is the independent city of Falls Church, Virginia, at 2.2 square miles (5.7 km2) in area, while the smallest actual county is Kalawao County, Hawaii, at 13 square miles (34 km2) in land area.

At the 2000 U.S. Census, 16.7% of U.S. counties had more than 100,000 inhabitants. This reflects the essentially rural nature of U.S. counties, whose grid was designed in the 19th century in a country still largely rural, and marginally affected by urbanization. Today, the vast majority of people in the United States are concentrated in a relatively small number of counties. The most populous county is Los Angeles County, California, with 9,818,605 inhabitants as of 2010, and the least populous county is Loving County, Texas, with 82 inhabitants as of 2010.

The most densely populated county (or county equivalent) is New York County, New York (coextensive with the Borough of Manhattan and consisting of Manhattan Island; Marble Hill, a neighborhood originally on the island but now physically attached to The Bronx; and several small adjacent islands), with 66,940 people per square mile (25,846 per km², or 38.691 square meters per person) as of 2000, and the least densely populated county equivalent is Lake and Peninsula Borough, Alaska, with 0.0767 people per square mile (0.0296 per km², or 33.768 km² per person) as of 2000. The least densely populated county equivalent is Yukon-Koyukuk Census Area, Alaska, with 0.0449 per square mile (0.0173 per km², or 57.683 km² per person) as of 2000.