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Birth Year Ranges from Census Age Classes
Censuses prior to 1850 did not give each individual's age, but instead merely tallied people by age class.  Listed below are the birth year ranges for each of the age classes in the 1790 through 1840 censuses.  For what the Column Nos. refer to, please see
What the Numbers in the Federal Censuses Mean
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]
Column Nos. AGE CLASS BIRTH YEAR
1
16 or over in or before 1774
2 15 or under
1774 - 1790
 
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]
Column Nos. AGE CLASS BIRTH YEAR
1 and 6 9 or under 1790 - 1800
2 and 7 10 to 15 1784 - 1790
3 and 8 16 to 25 1774 - 1784
4 and 9 26 to 44 1755 - 1774
5 and 10 45 or over in or before 1755
 
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]
Column Nos. AGE CLASS BIRTH YEAR
1 and 6 9 or under 1800 - 1810
2 and 7 10 to 15 1794 - 1800
3 and 8 16 to 25 1784 - 1794
4 and 9 26 to 44 1765 - 1784
5 and 10 45 or over in or before 1765
 
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]
Column Nos. AGE CLASS BIRTH YEAR
1 and 7 9 or under 1810 - 1820
2 and 8 10 to 15 1804 - 1810
3 16 to 18* 1801 - 1804
4 and 9 16 to 25 1794 - 1804
4 minus 3 19 to 25 1794 - 1801
5 and 10 26 to 44 1775 - 1794
6 and 11 45 or over in or before 1775
*Individuals in this Age Class will be duplicated in the next Age Class.
Which means you can subtract the number in column 3 from the number in column 4
and then consider any males left in column 4 to be in the age class 19 to 25.
Column Nos. AGE CLASS BIRTH YEAR
16, 20, 24, 28 13 or under 1806 - 1820
17, 21, 25, 29 14 to 25 1794 - 1806
18, 22, 26, 30 26 to 44 1775 - 1794
19, 23, 27, 31 45 or over in or before 1775
 
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]
Column Nos. AGE CLASS BIRTH YEAR
1 and 13 4 or under 1825 - 1830
2 and 14 5 to 9 1820 - 1825
3 and 15 10 to 14 1815 - 1820
4 and 16 15 to 19 1810 - 1815
5 and 17 20 to 29 1800 - 1810
6 and 18 30 to 39 1790 - 1800
7 and 19 40 to 49 1780 - 1790
8 and 20 50 to 59 1770 - 1780
9 and 21 60 to 69 1760 - 1770
10 and 22 70 to 79 1750 - 1760
11 and 23 80 to 89 1740 - 1750
12 and 24 90 to 99 1730 - 1740
13 and 26 100 or over in or before 1730

 
Column Nos. AGE CLASS BIRTH YEAR
27, 33, 45, 51 9 or under 1820 - 1830
28, 34, 46, 52 10 to 23 1806 - 1820
29, 35, 47, 53 24 to 35 1794 - 1806
30, 36, 48, 54 36 to 54 1775 - 1794
31, 37, 49, 55 55 to 99 1730 - 1775
32, 38, 50, 56 100 or over in or before 1730

 
Column Nos. AGE CLASS BIRTH YEAR
39 and 57 13 or under 1816 - 1830
40 and 58 14 to 24 1805 - 1816
41 and 59 25 and over in or before 1805
 
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]
Column Nos. AGE CLASS BIRTH YEAR
1 and 14 4 or under 1835 - 1840
2 and 15 5 to 9 1830 - 1835
3 and 16 10 to 14 1825 - 1830
4 and 17 15 to 19 1820 - 1825
5 and 18 20 to 29 1810 - 1820
6 and 19 30 to 39 1800 - 1810
7 and 20 40 to 49 1790 - 1800
8 and 21 50 to 59 1780 - 1790
9 and 22 60 to 69 1770 - 1780
10 and 23 70 to 79 1760 - 1770
11 and 24 80 to 89 1750 - 1760
12 and 25 90 to 99 1740 - 1750
13 and 26 100 or over in or before 1740

 
Column Nos. AGE CLASS BIRTH YEAR
27, 33, 41, 47 9 or under 1830 - 1840
28, 34, 42, 48 10 to 23 1816 - 1830
29, 35, 43, 49 24 to 35 1804 - 1816
30, 36, 44, 50 36 to 54 1785 - 1804
31, 37, 45, 51 55 to 99 1740 - 1785
32, 38, 46, 52 100 or over in or before 1740

 
Column Nos. AGE CLASS BIRTH YEAR
53 and 60 13 or under 1826 - 1840
54 and 61 14 to 24 1815 - 1826
55 and 62 25 or over in or before 1815

 
Column No. AGE CLASS BIRTH YEAR
58 21 or over in or before 1819
 
[1790]  [1800]  [1810]  [1820]  [1830]  [1840]

 

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