| Official Name: | South Newbury, New Hampshire |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | New Hampshire#USA |
| Pushpin Label: | South Newbury |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New Hampshire |
| Subdivision Type2: | County |
| Subdivision Name2: | Merrimack |
| Subdivision Type3: | Town |
| Subdivision Name3: | Newbury |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 732 |
| Coordinates: | 43.2956°N -71.9967°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 03272 |
| Area Code: | 603 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 871334 |
South Newbury is an unincorporated community in the town of Newbury in Merrimack County, New Hampshire, United States. It is located along New Hampshire Route 103, 3miles southeast of the main village of Newbury. Route 103 continues east to the towns of Bradford and Warner.
South Newbury has a separate ZIP code (03272) from the rest of the town of Newbury.