| Title | Category | Subcategory | Records |
|---|---|---|---|
| Irish Army Census 1922 | Armed Forces & Conflict | Regimental & Service Records | 32,579 |
| US Census 1940 | Census, Land & Surveys | Census | 133,308,836 |
| US Census 1930 | Census, Land & Surveys | Census | 123,949,394 |
| US Census 1920 | Census, Land & Surveys | Census | 107,126,219 |
| US Census 1910 | Census, Land & Surveys | Census | 92,346,579 |
| US Census 1900 | Census, Land & Surveys | Census | 76,223,972 |
| US Census 1880 | Census, Land & Surveys | Census | 50,358,403 |
| US Census 1870 | Census, Land & Surveys | Census | 40,288,027 |
| 1901 England, Wales & Scotland Census | Census, Land & Surveys | Census | 37,122,951 |
| 1911 Census For England & Wales | Census, Land & Surveys | Census | 36,369,508 |
| 1891 England, Wales & Scotland Census | Census, Land & Surveys | Census | 33,077,799 |
| 1881 England, Wales & Scotland Census | Census, Land & Surveys | Census | 29,841,206 |
| US Census 1860 | Census, Land & Surveys | Census | 27,120,064 |
| 1871 England, Wales & Scotland Census | Census, Land & Surveys | Census | 26,159,569 |
| 1861 England, Wales & Scotland Census | Census, Land & Surveys | Census | 22,615,981 |
| 1851 England, Wales & Scotland Census | Census, Land & Surveys | Census | 20,723,548 |
| US Census 1850 | Census, Land & Surveys | Census | 20,458,407 |
| 1841 England, Wales & Scotland Census | Census, Land & Surveys | Census | 18,436,583 |
| Canada Census 1911 | Census, Land & Surveys | Census | 7,157,334 |
| Canada Census 1901 | Census, Land & Surveys | Census | 5,167,205 |