| Official Name: | Netherthird |
| Country: | Scotland |
| Static Image Caption: | Netherthird primary school and nursery class |
| Coordinates: | 55.443°N -4.252°W |
| Language: | English |
| Language1: | Scots |
| Post Town: | CUMNOCK |
| Unitary Scotland: | East Ayrshire |
Netherthird is a small village to the south of Cumnock town centre in East Ayrshire, Scotland. It features a primary school, small grocery shops, bowling green and local community centre.[1] The area of Netherthird, together with the areas of Skerrington and Craigens, forms the southernmost portion of Cumnock, the next closest town in the vicinity.[2]