| Type | Region | Begin Date | End Date | Description | Format |
|---|
| History | ME | 1602 | 1820 |  The history of the state of Maine : from its first discovery, A.D. 1602, to the separation, A.D. 1820, inclusive | Online |
| Other | | 1605 | 1820 |  The home of the Hollands, 1605-1820 | Online |
| Family | NY | 1678 | 1820 |  History of New Paltz, New York and its old families (from 1678 to 1820) : including the Huguenot pioneers and others who settle | Online |
| Vital | | 1688 | 1820 | Supplement to South Carolina Marriages, 1688-1820 | Online |
| Family | LA | 1718 | 1820 | Afro-Louisiana History and Genealogy, 1718-1820 (Slave) | Online |
| Family | LA | 1719 | 1820 | Afro-Louisiana History and Genealogy, 1719-1820 (Free) | Online |
| Vital | | 1732 | 1820 |  Concord town records, 1732-1820 | Online |
| History | VT | 1763 | 1820 | Early history of Berlin, Vermont, 1763-1820 | Online |
| Church | PA | 1770 | 1820 | Bucks County, Pennsylvania Church Records, 1770-1820: Nockamixon Township | Online |
| Vital | WA | 1782 | 1820 | Washington County marriage register, 1782-1820 | Online |
| Vital | KY | 1794 | 1820 | Scott County, Kentucky Wills: 1794-1820 | Online |
| Vital | KY | 1799 | 1820 | Jessamine County, Kentucky Marriage Records 1799-1820 | Online |
| Vital | | 1800 | 1820 | South Carolina Marriages, 1800-1820 | Online |
| Vital | MD | 1801 | 1820 | Maryland Marriages, 1801-1820 | Online |
| Census | LA | 1810 | 1820 | Louisiana Census Records. Volume I: Avoyelles and St. Landry Parishes, 1810 and 1820 | Online |
| Census | LA | 1810 | 1820 | Louisiana Census Records. Volume II: Iberville, Natchitoches, Pointe Coupee, and Rapides Parishes, 1810 and 1820 | Online |
| Other | | 1817 | 1820 | My recollections of Rocktown, now known as Harrisonburg, from 1817-1820 | Online |
| Immigration | | 1818 | 1820 | Passenger Arrivals in the U.S., 1819-20 | Online |
| Immigration | | 1819 | 1820 | Passenger Arrivals, 1819-1820 | Online |
| Census | | 1820 | | 1820 United States Federal Census | Online |
| Other | | 1820 | | A discourse delivered in the East Parish in Bradford, December 22, 1820 | Online |
| Other | | 1820 | | Corlears Hook in 1820 : the Wagnerian cult, and our manners | Online |
| Other | | 1820 | | Pension List of 1820 | Online |
| History | | 1820 | | The history of Wells and Kennebunk : from the earliest settlement to the year 1820, at which time Kennebunk was set off, and in | Online |
| Immigration | | 1820 | 1829 | Passenger Arrivals at the Port of Charleston, 1820-1829 | Online |
| Military | | 1820 | 1832 | Revolutionary pension declarations, Strafford County, 1820-1832 : comprising sketches of soldiers of the Revolution | Online |
| Immigration | | 1820 | 1834 | Passenger Arrivals at the Port of Baltimore, 1820-1834 | Online |
| Immigration | | 1820 | 1835 | Atlantic Ports, Gulf Coasts, and Great Lakes Passenger Lists, Roll 7: 1820-1835 | Online |
| Immigration | | 1820 | 1863 | Atlantic Ports, Gulf Coasts, and Great Lakes Passenger Lists, Roll 6: 1820-1863 | Online |
| Immigration | | 1820 | 1870 | Atlantic Ports, Gulf Coasts, and Great Lakes Passenger Lists, Roll 4: 1820-1870 | Online |
| Immigration | | 1820 | 1871 | Atlantic Ports, Gulf Coasts, and Great Lakes Passenger Lists, Roll 1: 1820-1871 | Online |
| Immigration | | 1820 | 1872 | Baltimore Passenger and Immigration Lists, 1820-1872 | Online |
| Immigration | | 1820 | 1873 | Atlantic Ports, Gulf Coasts, and Great Lakes Passenger Lists, Roll 2: 1820-1873 | Online |
| Immigration | | 1820 | 1873 | Atlantic Ports, Gulf Coasts, and Great Lakes Passenger Lists, Roll 5: 1820-1873 | Online |
| Immigration | | 1820 | 1880 | Dutch Immigrants to America, 1820-1880 | Online |
| Church | | 1820 | 1895 | Annals of the First Presbyterian Church of Cleveland, 1820-1895 | Online |
| Other | | 1820 | 1899 | Albany Savings Bank, 1820-1899 | Online |
| Other | | 1820 | 1900 | Chronicles of Holland House, 1820-1900 | Online |
| Other | | 1820 | 1904 | Pioneers of the Magalloway : from 1820 to 1904 | Online |
| Immigration | | 1820 | 1943 | Boston Passenger Lists, 1820-1943 | Online |
| Immigration | | 1820 | 1945 | New Orleans Passenger Lists, 1820-1945 | Online |
| Immigration | | 1820 | 1948 | Baltimore Passenger Lists, 1820-1948 | Online |
| Census | AL | 1820 | | Alabama Census Returns, 1820 | Online |
| Vital | AR, KS | 1820 | 1949 | Arkansas Marriages, 1820-1949 | Online |
| Census | FL | 1820 | 1890 | Florida Census, 1820-90 | Online |
| Census | GA | 1820 | | Index to the United States Census of Georgia for 1820 | Online |
| Census | IL | 1820 | | Illinois Census Returns, 1820 | Online |
| Census | IL | 1820 | | Illinois Census, 1820 | Online |
| Census | IN | 1820 | | 1820 federal census for Indiana | Online |
| Census | IN | 1820 | 1880 | Whiteside(s) names listed in Indiana censuses for selected counties, 1820-1880 | Online |
| Vital | MO | 1820 | 1840 | Pike County, Missouri Marriages: 1820-1840 | Online |
| Vital | MO | 1820 | 1878 | Linn County, Missouri Wills, 1820-78 | Online |
| Vital | MO | 1820 | 8114 | Saline County, Missouri Marriages, 1820-81, Vols. 1-4 | Online |
| Other | NY | 1820 | 1850 | A bibliography of books and pamphlets printed at Ithaca, N.Y., 1820-1850 | Online |
| Immigration | NY | 1820 | 1850 | New York, 1820-1850 Passenger and Immigration Lists | Online |
| Immigration | NY | 1820 | 1850 |  Passenger and Immigration: New York, 1820-1850 | CD |
| History | NY | 1820 | 1943 | People's history of Kingston, Rondout and vicinity : the first capital of New York State (1820 to 1943) | Online |
| Immigration | NY | 1820 | 1957 | New York Passenger Lists, 1820-1957 | Online |
| Census | TN | 1820 | | Index to the 1820 Census of Tennessee | Online |
| Census | TX | 1820 | 1890 | Texas Census, 1820-90 | Online |
| World | UK | 1820 | |  Ireland Circa 1820 [2 sheets] | CD |
| Census | VA | 1820 | | Russell County, Virginia, census of 1820 | Online |
| Census | WI | 1820 | 1890 | Wisconsin Census, 1820-90 | Online |
| Vital | WI | 1820 | 1907 | Wisconsin Births, 1820-1907 | Online |
| Vital | WI | 1820 | 1907 | Wisconsin Deaths, 1820-1907 | Online |
