The Census Birth Date Calculator

Chart Used To Calculate Year Of Birth From The Census Birth Date Calculator

A stands for age. For instance, if you are looking up someone in the 1850 census and it states that their age is 37, Use the chart, under 1850, scan down to age 37, and you will see the person was born in 1813. Print this page and take it to the library with you.
"Census Day"

The date the census taker wrote on the top of the page is not as important as the "Official census date" everyone in that household as of the date and their age on THAT DATE is recorded.

Congress specifies a "census day" and the time allowed to take the census. The census taker was to count the people who lived in each house as of the "census day." which may include anyone who died after census day, or exclude any child born after the census day. Analysis is imperative here. (i.e. the census days for 1820 and 1830 are not exactly 10 years apart. There is a 2 month difference.

So, if a person was born between June 1, 1820 and August 7, 1820 the child would appear in 1820 as "under 5" and in 1830 as "under 10" rather than "of 10 and under 16," because he would not yet be 10.

Official census dates were and time alloted:
2 August 1790* time allowed 9 Months
3 August 1800 time allowed 9 Months
6 August 1810 time allowed 10 Months
7 Aug 1820 time allowed 13 Months
1 June 1830 1 time allowed 12 Months, 1 June 1840 time allowed 18 Months, 1 June - 1850, 1860, 1870 time allowed 5 Months 1 June - 1880**, 1890***, 1900 time allowed 1 Month
15 April 1910 time allowed 1 Month
1 January 1920 time allowed 1 Month
1 April 1930 except for Alaska which was 1 October 1930
* By most authorities the census for that states of Delaware, Georgia, Kentucky, New Jersey, Tennesse, and Virginia were burned during the was of 1812. Some of these census records over the years have been reconsructed from state enumerations and tax lists.

In 1880 Utah juggled the housholds in order to disuise polygamy because federal officals was seeking out evidence in order to convict and presecute those who were praticipating in unlawful c0-haditation.

*** It is said that the originals of the 1890 special schedules - mortality, crime, paupersim, special clases and portions of the transprotation and insurance schedules were damaged and destroyed by the Department of the Interior
The poluplation portions remained in good shape as late as 1903 and then on the afternoon of 10 Jan. 1921 various schedules which were stored in the basement of the Commerce Department; that destoryed the majority of it because of the basement being flooded. An assesment of the situiation the next morning was found recorded as such;
A cursory examination shows that the census schedules from 1790 to and including 1870, with the exception of those for 1830 and 1840, are on the fifth floor of the Commerce Building and have not been damaged. The schedules of censuses of 1850, 1880, 1900 and 1910 have been damaged by water, and it is estimated that 10 percent of these schedules will have to be opened and dried, and some of them recopied.
The above mentioned in the comment were in a vault on the bottom shelf. The 1890 were outside the vault and 25 percent were destroyed and what remained of them 50 percent were damaged by fire, smoke and water. The new census diretor of 1921 ordered these returned to the vault but in December 1932 another sent the Library Congres a list of papers to be destoryed and the original 1890 census was on it. and then what ever was left of the 1890 census Congress in February 1933 authorized the remaineder to be destroyed which is said to have been done in 1934.

Fragments through the years have been found of several counties of the following states: Alabama, Georgia, Illinois, Minnesota, New Jersye, New York, North Carolina, Ohio, South Dakota, Texas and the District of COlumbia - These have been microfilmed and only talley a total of three rolls and contain only about 6,000 of the 62 million individuals of the original census.

Also there was 'padding' of a census in the frontier areas that were anxious to obtaine statehood. Besides those being missed that lived in very remote areas - or just someone or families who 'dodged' the census taker.


 A  1850 1860 1870 1880 1900 1910 1920  A   1850 1860 1870 1880 1900 1910 1920
 1  1849 1859 1869 1879 1899 1909 1919  51  1799 1809 1819 1829 1849 1859 1869
 2  1848 1858 1868 1878 1898 1908 1918  52  1798 1808 1818 1828 1848 1858 1868 
 3  1847 1857 1867 1877 1897 1907 1917  53  1797 1807 1817 1827 1847 1857 1867
 4  1846 1856 1866 1876 1896 1906 1916  54  1796 1806 1816 1826 1846 1856 1866
 5  1845 1855 1865 1875 1895 1905 1915  55  1795 1805 1815 1825 1845 1855 1865
 6  1844 1854 1864 1874 1894 1904 1914  56  1794 1804 1814 1824 1844 1854 1864
 7  1843 1853 1863 1873 1893 1903 1913  57  1793 1803 1813 1823 1843 1853 1863
 8  1842 1852 1862 1872 1892 1902 1912  58  1792 1802 1812 1822 1842 1852 1862
 9  1841 1851 1861 1871 1891 1901 1911  59  1791 1801 1811 1821 1841 1851 1861
10  1840 1850 1860 1870 1890 1900 1910  60  1790 1800 1810 1820 1840 1850 1860
11  1839 1849 1859 1869 1889 1899 1909  61  1789 1799 1809 1819 1839 1849 1859
12  1838 1848 1858 1868 1888 1898 1908  62  1788 1798 1808 1818 1838 1848 1858
13  1837 1847 1857 1867 1887 1897 1907  63  1787 1797 1807 1817 1837 1847 1857
14  1836 1846 1856 1866 1886 1896 1906  64  1786 1796 1806 1816 1836 1846 1856
15  1835 1845 1855 1865 1885 1895 1905  65  1785 1795 1805 1815 1835 1845 1855
16  1834 1844 1854 1864 1884 1894 1904  66  1784 1794 1804 1814 1834 1844 1854
17  1833 1843 1853 1863 1883 1893 1903  67  1783 1793 1803 1813 1833 1843 1853
18  1832 1842 1852 1862 1882 1892 1902  68  1782 1792 1802 1812 1832 1842 1852
19  1831 1841 1851 1861 1881 1891 1901  69  1781 1791 1801 1811 1831 1841 1851
20  1830 1840 1850 1860 1880 1890 1900  70  1780 1790 1800 1810 1830 1840 1850
21  1829 1839 1849 1859 1879 1889 1899  71  1779 1789 1799 1809 1829 1839 1849
22  1828 1838 1848 1858 1878 1888 1898  72  1778 1788 1798 1808 1828 1838 1848
23  1827 1837 1847 1857 1877 1887 1897  73  1777 1787 1797 1807 1827 1837 1847
24  1826 1836 1846 1856 1876 1886 1896  74  1776 1786 1796 1806 1826 1836 1846
25  1825 1835 1845 1855 1875 1885 1895  75  1775 1785 1795 1805 1825 1835 1845
26  1824 1834 1844 1854 1874 1884 1894  76  1774 1784 1794 1804 1824 1834 1844
27  1823 1833 1843 1853 1873 1883 1893  77  1773 1783 1793 1803 1823 1833 1843
28  1822 1832 1842 1852 1872 1882 1892  78  1772 1782 1792 1802 1822 1832 1842
29  1821 1831 1841 1851 1871 1881 1891  79  1771 1781 1791 1801 1821 1831 1841
30  1820 1830 1840 1850 1870 1880 1890  80  1770 1780 1790 1800 1820 1830 1840
31  1819 1829 1839 1849 1869 1879 1889  81  1769 1779 1789 1799 1819 1829 1839
32  1818 1828 1838 1848 1868 1888 1888  82  1768 1778 1788 1798 1818 1828 1838
33  1817 1827 1837 1847 1867 1877 1887  83  1767 1777 1787 1797 1817 1827 1837
34  1816 1826 1836 1846 1866 1876 1886  84  1766 1776 1786 1796 1816 1826 1836
35  1815 1825 1835 1845 1865 1875 1885  85  1765 1775 1785 1795 1815 1825 1835
36  1814 1824 1834 1844 1864 1874 1884  86  1764 1774 1784 1794 1814 1824 1834
37  1813 1823 1833 1843 1863 1873 1883  87  1763 1773 1783 1793 1813 1823 1833
38  1812 1822 1832 1842 1862 1872 1882  88  1762 1772 1782 1792 1812 1822 1832
39  1811 1821 1831 1841 1861 1871 1881  89  1761 1771 1781 1791 1811 1821 1831
40  1810 1820 1830 1840 1860 1870 1880  90  1760 1770 1780 1790 1810 1820 1830
41  1809 1819 1829 1839 1859 1869 1879  91  1759 1769 1779 1789 1809 1819 1829
42  1808 1818 1828 1838 1858 1868 1878  92  1758 1768 1778 1788 1808 1818 1828
43  1807 1817 1827 1837 1857 1867 1877  93  1757 1767 1777 1787 1807 1817 1827
44  1806 1816 1826 1836 1856 1866 1876  94  1756 1766 1776 1786 1806 1816 1826
45  1805 1815 1825 1835 1855 1865 1875  95  1755 1765 1775 1785 1805 1815 1825
46  1804 1814 1824 1834 1854 1864 1874  96  1754 1764 1774 1784 1804 1814 1824
47  1803 1813 1823 1833 1853 1863 1873  97  1753 1763 1773 1783 1803 1813 1823
48  1802 1812 1822 1832 1852 1862 1872  98  1752 1762 1772 1782 1802 1812 1822
49  1801 1811 1821 1831 1851 1861 1871  99  1751 1761 1771 1781 1801 1811 1821
50  1800 1810 1820 1830 1850 1860 1870  100 1750 1760 1770 1780 1800 1810 1820

 






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