| Official Name: | Harborside, Maine |
| Settlement Type: | Village |
| Pushpin Map: | Maine |
| Pushpin Label: | Harborside |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Maine |
| Subdivision Type2: | County |
| Subdivision Name2: | Hancock |
| Subdivision Type3: | Town |
| Subdivision Name3: | Brooksville |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 89 |
| Coordinates: | 44.3489°N -68.8147°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 04642 |
| Area Code: | 207 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 567596 |
Harborside is an unincorporated village in the town of Brooksville, Hancock County, Maine, United States. The community is located on the west coast of Cape Rosier, on Penobscot Bay, southwest of Ellsworth. Harborside had a post office from April 7, 1898, until December 20, 2003; it still has its own ZIP code, 04642.[1] [2]