| Mountnessing Mill | |
|---|---|
 The restored mill, April 2007 | |
 | |
| Origin | |
| Mill name | Mountnessing Mill |
| Mill location | TQ 631 979 |
| Coordinates | 51°39′22″N 0°21′29″E / 51.656°N 0.358°E |
| Operator(s) | Essex County Council |
| Year built | 1807 |
| Information | |
| Purpose | Corn mill |
| Type | Post mill |
| Roundhouse storeys | Single storey roundhouse |
| No. of sails | Four sails |
| Type of sails | Spring sails |
| Windshaft | Cast iron |
| Winding | Tailpole |
| Auxiliary power | Portable steam engine |
| No. of pairs of millstones | Two pairs |
Mountnessing Windmill is a grade II* listed[1] post mill at Mountnessing, Essex, England. Built in 1807, it was most recently restored to working order in 1983.