Selm
| Selm   | |
|---|---|
| Location of Selm   within Unna   district | |
| Coordinates: 51°41′N 7°29′E / 51.683°N 7.483°E | |
| Country | Germany | 
| State | North Rhine-Westphalia | 
| Admin. region | Arnsberg | 
| District | Unna | 
| Government | |
| • Mayor (2020–25) | Thomas Orlowski (SPD) | 
| Area | |
|  • Total | 60.41 km2 (23.32 sq mi) | 
| Elevation | 111 m (364 ft) | 
| Population  (2023-12-31) | |
|  • Total | 26,299 | 
| • Density | 440/km2 (1,100/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| Postal codes | 59379 | 
| Dialling codes | 02592, 02306 | 
| Vehicle registration | UN | 
| Website | www.selm.de | 
Selm (German pronunciation: [zɛlm] ⓘ) is a town in the district of Unna, in North Rhine-Westphalia, Germany. It is situated approximately 20 kilometers north of Dortmund and 25 kilometers west of Hamm.