| State: | NH |
| Type: | NH |
| Route: | 135 |
| Map Custom: | yes |
| Map Notes: | Map of northern New Hampshire with NH 135 highlighted in red |
| Length Mi: | 46.677 |
| Direction A: | South |
| Terminus A: | in Woodsville |
| Junction: |
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| Direction B: | North |
| Terminus B: | in Lancaster |
| Counties: | Grafton, Coos |
| Previous Type: | NH |
| Previous Route: | 132 |
| Next Type: | NH |
| Next Route: | 136 |
New Hampshire Route 135 (abbreviated NH 135) is a 46.677adj=midNaNadj=mid north–south state highway in New Hampshire. The highway runs along the Connecticut River from Woodsville in the town of Haverhill to Lancaster.
The southern terminus of NH 135 is at New Hampshire Route 10 in Woodsville. The northern terminus is at U.S. Route 2 and U.S. Route 3 in Lancaster.