| Official Name: | Søndersø |
| Settlement Type: | Town |
| Pushpin Map: | Denmark Region of Southern Denmark |
| Pushpin Label Position: | above |
| Pushpin Map Caption: | Location in the Region of Southern Denmark |
| Subdivision Type: | Country |
| Subdivision Name: | Denmark |
| Subdivision Type1: | Region |
| Subdivision Name1: | Southern Denmark |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Nordfyn |
| Area Urban Km2: | 2.8 |
| Population As Of: | 2024 |
| Population Footnotes: | [1] |
| Population Urban: | 3336 |
| Population Density Urban Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Coordinates: | 55.4856°N 10.2503°W |
Søndersø is a town in central Denmark with a population of 3,336 (1 January 2024), located in Nordfyn municipality on the island of Funen.
The town is home to the following companies: