Key to the 1810 census:
Each digit of the 5 digit number represents an age group.
Free white males: Free white females:
  • First digit = under 10
  • Second digit = 10 and under 16
  • Third digit = 16 and under 26
  • Fourth digit = 26 and under 45
  • Fifth digit = 45 and up
  • First digit = under 10
  • Second digit = 10 and under 16
  • Third digit = 16 and under 26
  • Fourth digit = 26 and under 45
  • Fifth digit = 45 and up