Wallenhorst
| Wallenhorst  | |
|---|---|
| Location of Wallenhorst  within Osnabrück   district | |
| Coordinates: 52°21′N 8°1′E / 52.350°N 8.017°E | |
| Country | Germany | 
| State | Lower Saxony | 
| District | Osnabrück | 
| Subdivisions | 4 districts | 
| Government | |
| • Mayor (2021–26) | Otto Steinkamp (Ind.) | 
| Area | |
|  • Total | 47.18 km2 (18.22 sq mi) | 
| Elevation | 88 m (289 ft) | 
| Population  (2023-12-31) | |
|  • Total | 22,649 | 
| • Density | 480/km2 (1,200/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| Postal codes | 49134 | 
| Dialling codes | 05407 | 
| Vehicle registration | OS, BSB, MEL, WTL | 
| Website | www.wallenhorst.de | 
Wallenhorst is a municipality in the district of Osnabrück, in Lower Saxony, Germany. It is situated in the Wiehengebirge, approx. 10 km north of Osnabrück.
The New St. Alexander Church serves as a reference height for all other heights in the German Mean Height Reference System (Normalhöhennull).