| Official Name: | Asby |
| Pushpin Map: | Sweden Östergötland#Sweden |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type2: | County |
| Subdivision Name2: | Östergötland |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Ydre |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 57.9028°N 15.2075°W |
Asby is a village in Ydre Municipality, Östergötland County. It lies in the traditional province of Östergötland near the arm of the Lake Sommen called Asbyfjärden. According to Svenskt ortnamnslexikon the name of the locality is first attested in 1336 as Aasby, in reference to the drumlin-like ridge (sv|ås) the locality is built on.[1]
Sweden's stoutest spruce grows in Asby.[2]