| Type: | Stadt |
| Image Coa: | DEU Altensteig COA.svg |
| Coordinates: | 48.5864°N 8.6047°W |
| Image Plan: | Altensteig in CW.svg |
| State: | Baden-Württemberg |
| Region: | Karlsruhe |
| District: | Calw |
| Elevation: | 504 |
| Area: | 53.21 |
| Area Code: | 07453 |
| Licence: | CW |
| Gemeindeschlüssel: | 08 2 35 006 |
Altensteig (pronounced as /de/; Swabian: Aldaschdaeg) is a town in the district of Calw, in Baden-Württemberg, Germany.
Altensteig was most likely given town rights by the Counts of Hohenberg around the middle of the 14th century. In 1398, the town became a possession of the Margraviate of Baden and then of the Duchy of Württemberg in 1603. Altensteig was made the seat of its own district, which was reorganized in 1808 as, which was dissolved two years later and resulted in Altensteig being assigned to . That district, too, was dissolved in 1938 and Altensteig was assigned to the newly-organized Landkreis Calw.[1]
The city (Stadt) of Simmersfeld is located at the south-western edge of the district of Calw, in the German state of Baden-Württemberg. It lies along the border with the district of Freudenstadt to the south and west. Altensteig's municipal area is located mostly in the Black Forest, though a portion of its eastern mass lies in the . Elevation above sea level in the municipal area ranges from a high of 747m (2,451feet) Normalnull (NN) to a low of 421m (1,381feet) NN.[1]
Portions of the Federally protected,, and nature reserves are located in Altensteig's municipal area.[1]
Altensteig has nine boroughs: Altensteig, Altensteigdorf, Berneck, Garrweiler, Hornberg, Spielberg, Überberg, Walddorg, Wart. There are also 15 villages in the municipal area: Bahnhof Berneck, Baiermühle, Bruderhaus, Chausseehaus, Elektrizitätswerk, Fischhaus, Heselbronn, Internationales Forum Burg Hornberg, Kohlsägmühle, Lengenloch, Lohmühle, Monhardt, Trögelsbach, Ziegelhütte, Zumweiler.[1]
The municipal coat of arms of Altensteig shows a castle in red and white, upon a field of yellow and below a black, atop a green mountain approached by a yellow road. This coat of arms first appeared on a town seal in 1604, and was modified in 1935 with the addition of the stag antler to reference Württemberg. The winding path refers to the German word Steige, or "path", and to the name Altensteig.[1]
Altensteig is connected to Germany's network of roadways by Bundesstraße 28. The city was also connected by rail via the from 1891 until its shutdown in 1967. Local public transportation is provided by the .[1]