| State: | NH |
| Type: | NH |
| Route: | 129 |
| Map Custom: | yes |
| Map Notes: | Map of central New Hampshire with NH 129 highlighted in red |
| Length Mi: | 8.724 |
| Direction A: | West |
| Terminus A: | South Village Road in Loudon |
| Direction B: | East |
| Terminus B: | in Gilmanton |
| Counties: | Merrimack, Belknap |
| Previous Type: | NH |
| Previous Route: | 128 |
| Next Type: | NH |
| Next Route: | 130 |
New Hampshire Route 129 (abbreviated NH 129) is an 8.724adj=midNaNadj=mid secondary east–west state highway in New Hampshire. The road runs between Loudon and Gilmanton.
The southwestern terminus of NH 129 is in Loudon at South Village Road, west of the intersection with New Hampshire Route 106. The northeastern terminus is at New Hampshire Route 107 in Gilmanton.