| Official Name: | Gammelgarn |
| Native Name: | Gammelgan or Gammelgän |
| Pushpin Map: | Sweden Gotland |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Gotland Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Gotland County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gotland |
| Area Footnotes: | [1] |
| Area Total Km2: | 38.20 |
| Population As Of: | 2014 |
| Population Footnotes: | [2] |
| Population Total: | 187 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 57.4044°N 18.8044°W |
Gammelgarn is a populated area, a socken (not to be confused with parish), on the Swedish island of Gotland.[3] It comprises the same area as the administrative Gammelgarn District, established on 1January 2016.[4]
Gammelgarn is situated in the central east part of Gotland.[5] The medieval Gammelgarn Church is located in the socken.[6] On the south shore of Gammelgarn are the fishing villages of Grynge and Sjauster (or Sjaustru), the latter with a long sandy beach.[7] [8]
, Gammelgarn Church belongs to Östergarn parish in Romaklosters pastorat, along with the churches in Östergarn,Kräklingbo, Anga and Ala.[9] [10]