Altena | |
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![]() View of Altena Castle in September 2008 | |
Location of Altena within Märkischer Kreis district ![]() | |
Coordinates: 51°18′N 07°40′E / 51.300°N 7.667°E | |
Country | Germany |
State | North Rhine-Westphalia |
Admin. region | Arnsberg |
District | Märkischer Kreis |
Subdivisions | 7 |
Government | |
• Mayor (2020–25) | Uwe Kober[1] (CDU) |
Area | |
• Total | 44.29 km2 (17.10 sq mi) |
Highest elevation | 511 m (1,677 ft) |
Lowest elevation | 145 m (476 ft) |
Population (2023-12-31)[2] | |
• Total | 16,315 |
• Density | 370/km2 (950/sq mi) |
Time zone | UTC+01:00 (CET) |
• Summer (DST) | UTC+02:00 (CEST) |
Postal codes | 58741–58762 |
Dialling codes | 02352 |
Vehicle registration | MK |
Website | www.altena.de |
Altena (; Westphalian: Altenoa) is a town in the district of Märkischer Kreis, North Rhine-Westphalia, Germany. The town's castle is the origin for the later Dukes of Berg. Altena is situated on the Lenne river valley, in the northern stretches of the Sauerland.