This is a list of constituencies in the "historical" country of Essex
| Constituency | Created | Abolished | Members | Notes |
| Essex | 1832 | Two | ||
| Maldon | 1983 | Two | ||
| Colchester | 1983 | Two | ||
| Harwich | 2010 | Two |
| Constituency | Created | Abolished | Members | Notes |
| South Essex | 1832 | 1885 | Two | From Essex |
| North Essex | 1832 | 1868 | Two | From Essex |
| Maldon | 1983 | Two | ||
| Colchester | 1983 | Two | ||
| Harwich | 2010 | Two |
| Constituency | Created | Abolished | Members | Notes |
| South Essex | 1832 | 1885 | Two | |
| East Essex | 1868 | 1885 | Two | From North Essex |
| West Essex | 1868 | 1885 | Two | From North Essex |
| Maldon | 1983 | Two | ||
| Colchester | 1983 | Two | ||
| Harwich | 2010 | Two |
| Constituency | Created | Abolished | Members | Notes |
| Chelmsford | 1885 | 1918 | One | From East Essex, South Essex and West Essex |
| Epping | 1885 | 1918 | One | From South Essex |
| Saffron Walden | 1885 | 1918 | One | From West Essex |
| Walthamstow | 1885 | 1918 | One | From South Essex |
| Romford | 1885 | 1918 | One | From South Essex |
| South East Essex | 1885 | 1945 | One | From South Essex |
| Maldon | 1983 | One | Received parts of abolished East Essex | |
| Colchester | 1983 | One | Received parts of abolished East Essex | |
| Harwich | 2010 | One | Received parts of abolished East Essex |