Timeline events for date 1866
| Comunity | Date | Events |
|---|---|---|
| Corsham | 1866 AD | Church of St. Philip and St. John, Neston, built |
| Downton | 1866 AD | Salisbury and Dorset Junction Railway built Downton Station halfway up Lode Hill on the Salisbury - Romsey line. |
| Marlborough | 1866 AD | Plymouth Brethren moved to a building in High Street; Local Board of Health established |