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United States Population Data

2010 populations categorized by age group for each county in the United States were obtained from the Census Bureau and saved in the file populations_by_age.cas.

The file consists of 4 fields: state and county name, 5-digit state and county code, population, and age group.

Age groups are numbered 1-18 where:

  • 1 is the youngest group (ages 0-4)
  • 2 the next youngest (ages 5-9)
  • and so on, through 17 (ages 80-84) and 18 (ages 85+)

The file includes 50 states and the District of Columbia but excludes Puerto Rico and island territories.

zip file, < 1 mb