| Official Name: | Sonstorp |
| Pushpin Map: | Sweden Östergötland#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Finspång Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Östergötland County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Östergötland |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.57 |
| Population As Of: | 31 December 2020 |
| Population Footnotes: | [2] |
| Population Total: | 430 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 58.7167°N 53°W |
Sonstorp (in Swedish pronounced as /ˈsɔ̌nːstɔrp/)[3] is a locality situated in Finspång Municipality, Östergötland County, Sweden with 429 inhabitants in 2010.
The following sports clubs are located in Finspång Municipality: