Altensteig
| Altensteig   | |
|---|---|
| Altensteig Altstadt, June 2018 | |
| Location of Altensteig   within Calw   district | |
| Coordinates: 48°35′11″N 8°36′17″E / 48.58639°N 8.60472°E | |
| Country | Germany | 
| State | Baden-Württemberg | 
| Admin. region | Karlsruhe | 
| District | Calw | 
| Area | |
|  • Total | 53.21 km2 (20.54 sq mi) | 
| Elevation | 504 m (1,654 ft) | 
| Population  (2023-12-31) | |
|  • Total | 10,917 | 
| • Density | 210/km2 (530/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| Dialling codes | 07453 | 
| Vehicle registration | CW | 
| Website | www | 
Altensteig (German pronunciation: [ˈaltn̩ʃtaɪk]; Swabian: Aldaschdaeg) is a town in the district of Calw, in Baden-Württemberg, Germany.