| Title | Category | Subcategory | Records |
|---|---|---|---|
| Irish Army Census 1922 | Armed Forces & Conflict | Regimental & Service Records | 32,579 |
| US Census 1940 | Census, Land & Surveys | Census | 133,308,829 |
| US Census 1930 | Census, Land & Surveys | Census | 123,949,387 |
| US Census 1920 | Census, Land & Surveys | Census | 107,126,210 |
| US Census 1910 | Census, Land & Surveys | Census | 92,346,579 |
| US Census 1900 | Census, Land & Surveys | Census | 76,223,971 |
| US Census 1880 | Census, Land & Surveys | Census | 50,358,403 |
| US Census 1870 | Census, Land & Surveys | Census | 40,288,026 |
| 1901 England, Wales & Scotland Census | Census, Land & Surveys | Census | 37,122,969 |
| 1911 Census For England & Wales | Census, Land & Surveys | Census | 36,369,600 |
| 1891 England, Wales & Scotland Census | Census, Land & Surveys | Census | 33,077,887 |
| 1881 England, Wales & Scotland Census | Census, Land & Surveys | Census | 29,841,239 |
| US Census 1860 | Census, Land & Surveys | Census | 27,120,064 |
| 1871 England, Wales & Scotland Census | Census, Land & Surveys | Census | 26,159,611 |
| 1861 England, Wales & Scotland Census | Census, Land & Surveys | Census | 22,616,082 |
| 1851 England, Wales & Scotland Census | Census, Land & Surveys | Census | 20,723,550 |
| US Census 1850 | Census, Land & Surveys | Census | 20,458,407 |
| 1841 England, Wales & Scotland Census | Census, Land & Surveys | Census | 18,436,586 |
| Canada Census 1911 | Census, Land & Surveys | Census | 7,157,334 |
| Canada Census 1901 | Census, Land & Surveys | Census | 5,167,205 |