| Official Name: | Dunstan, Maine |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Maine#USA |
| Pushpin Label: | Dunstan |
| Coordinates: | 43.5706°N -70.3875°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Maine |
| Subdivision Type2: | County |
| Subdivision Name2: | Cumberland |
| Subdivision Type3: | Town |
| Subdivision Name3: | Scarborough |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 3.19 |
| Area Land Sq Mi: | 3.16 |
| Area Water Sq Mi: | 0.03 |
| Area Total Km2: | 8.26 |
| Area Land Km2: | 8.19 |
| Area Water Km2: | 0.07 |
| Population As Of: | 2020 |
| Population Density Km2: | 254.39 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 60 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 04074 (Scarborough) |
| Area Code: | 207 |
| Blank Name: | FIPS code |
| Blank Info: | 23-18965 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806277 |
| Population Total: | 2083 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 658.76 |
Dunstan is a census-designated place (CDP) in the town of Scarborough, Cumberland County, Maine, United States. Also known as West Scarborough, the community is in the southwest part of the town, along U.S. Route 1. Maine State Route 9 runs northward from Dunstan with US 1 towards Portland but leads southeastward out of the community as Pine Point Road, towards Old Orchard Beach. Interstate 95 (the Maine Turnpike) forms the northwestern edge of the CDP, and the York County line is the southwestern border, with the city of Saco directly adjacent to Dunstan. The northeast edge of the CDP is the Dunstan River, an arm of the tidal Scarborough River.
Dunstan was first listed as a CDP prior to the 2020 census.