| Official Name: | Hammarby |
| Pushpin Map: | Sweden Gävleborg#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Sandviken Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Gävleborg County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gästrikland |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.08 |
| Population As Of: | 31 December 2010 |
| Population Total: | 552 |
| Population Density Km2: | 510 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 60.55°N 50°W |
Hammarby is a locality situated in Sandviken Municipality, Gävleborg County, Sweden with 552 inhabitants in 2010.