| Name | Location | County | Country | Power source | Type | Function | River |
| Post mill, Roydon | Roydon | Norfolk | United Kingdom | Wind | Post mill | Corn mill | |
| Watermill, Roydon | Roydon | Essex | United Kingdom | Water | Watermill | Corn mill | Stort and Lea |
| Name | Location | County | Country | Power source | Type | Function | River |
| Post mill, Roydon | Roydon | Norfolk | United Kingdom | Wind | Post mill | Corn mill | |
| Watermill, Roydon | Roydon | Essex | United Kingdom | Water | Watermill | Corn mill | Stort and Lea |