| Year | Census | Index | Notes |
| 1790 | Film | CD, Book | |
| 1800 | Film | CD, Book | |
| 1810 | Film | CD, Book | |
| 1820 | Film | Book | |
| 1830 | Film | Book | |
| 1840 | Film | Book | |
| 1850 | Film | Book | |
| 1860 | Film | Book; Ancestry.com | |
| 1870 | Film* | CD | Partial; see below |
| 1870 African-American | CD | ||
| 1880 | CD | ||
| 1920 | Ancestry.com | . | |
| 1930 | Ancestry.com |
* 1870 includes only New London, Tolland, Windham
Litchfield, New Haven, Tolland & Windham 1800
| Connecticut | 1670 | Call # F93 .H73 |
| Quakers | 1828 | Call # F118 .Q34 1989 |