| Official Name: | Insjön |
| Pushpin Map: | Sweden Dalarna#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Leksand Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Dalarna County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Dalarna |
| Area Footnotes: | [1] |
| Area Total Km2: | 3.48 |
| Population As Of: | 31 December 2010 |
| Population Total: | 2,149 |
| Population Density Km2: | 618 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 60.6833°N 21°W |
Insjön is a locality situated in Leksand Municipality, Dalarna County, Sweden with 2,149 inhabitants in 2010. In 1899 Åhléns started out as the mail order business Åhlén & Holm. 19 years later, in 1918, the mail order firm Clas Ohlson was founded in Insjön. The sawmill Bergkvist sågen was also founded here.