| Title | Category | Subcategory | Records |
|---|---|---|---|
| United States Marriages | Life Events (BMDs) | Civil Marriage & Divorce | 214,136,509 |
| US Census 1940 | Census, Land & Surveys | Census | 133,308,847 |
| England & Wales Births 1837-2006 | Life Events (BMDs) | Civil Births | 133,106,977 |
| US Census 1930 | Census, Land & Surveys | Census | 123,949,399 |
| UK Electoral Registers & Companies House Directors 2002-2018 | Census, Land & Surveys | Electoral Rolls | 115,503,057 |
| England & Wales, Electoral Registers 1920-1932 | Census, Land & Surveys | Electoral Rolls | 108,581,699 |
| US Census 1920 | Census, Land & Surveys | Census | 107,126,216 |
| British & Irish Roots Collection | Travel & Migration | Migration | 98,536,325 |
| England & Wales Marriages 1837-2005 | Life Events (BMDs) | Civil Marriage & Divorce | 95,653,033 |
| US Census 1910 | Census, Land & Surveys | Census | 92,346,580 |
| England & Wales Deaths 1837-2007 | Life Events (BMDs) | Civil Deaths & Burials | 87,447,277 |
| Social Security Death Index | Life Events (BMDs) | Civil Deaths & Burials | 86,128,596 |
| New York Passenger Lists & Arrivals | Travel & Migration | Passenger Lists | 85,148,761 |
| US Census 1900 | Census, Land & Surveys | Census | 76,223,974 |
| England Births & Baptisms 1538-1975 | Life Events (BMDs) | Parish Baptisms | 64,372,360 |
| US Census 1880 | Census, Land & Surveys | Census | 50,358,403 |
| Mexico Baptism Index 1560-1950 | Life Events (BMDs) | Parish Baptisms | 43,300,948 |
| 1939 Register | Census, Land & Surveys | Census | 42,064,626 |
| US Census 1870 | Census, Land & Surveys | Census | 40,288,026 |
| 1901 England, Wales & Scotland Census | Census, Land & Surveys | Census | 37,122,991 |