| Official Name: | Newton Junction, New Hampshire |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | New Hampshire#USA |
| Pushpin Label: | Newton Junction |
| Pushpin Label Position: | top |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New Hampshire |
| Subdivision Type2: | County |
| Subdivision Name2: | Rockingham |
| Subdivision Type3: | Town |
| Subdivision Name3: | Newton |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 125 |
| Coordinates: | 42.8672°N -71.0658°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 03859 |
| Area Code: | 603 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 868735 |
Newton Junction is an unincorporated community in the town of Newton in Rockingham County, New Hampshire, United States. It is located in the western portion of Newton, between the main portion of Newton (to the east) and South Kingston (to the west).
Amtrak's Downeaster railroad line passes through the village, but does not have a stop. The nearest Downeaster stations are Haverhill, Massachusetts, to the south, and Exeter, New Hampshire, to the north. The West Amesbury Branch Railroad once led southeast from Newton Junction to Merrimac, Massachusetts.
Although it is not a town, "Newton Junction" is a valid address used for the 03859 ZIP code in Newton (post office boxes only).