|Elevation||146 m (479 ft) avg.|
|Land area1||47.69 km2 (18.41 sq mi)|
|- Density||648 /km2 (1,680 /sq mi)|
|INSEE/Postal code||52448/ 52100|
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.|
|2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.|
It has a population of 31,000 (2003 figure) and is a subprefecture of the department. Although Saint-Dizier is marginally the most populous commune in Haute-Marne, the préfecture (capital) resides in the somewhat smaller commune of Chaumont.
The town originated as a fortified settlement around a thirteenth century château, eventually becoming a royal fortress to guard the French kingdom's eastern approaches. The town was besieged and captured by Charles V, Holy Roman Emperor, in the summer of 1544. A fire in 1775 destroyed two-thirds of the town centre. The château was owned by the Orléans family until the French Revolution, was a base for German troops during World War II, and currently houses the Municipal Museum.
Notable people 
Saint-Dizier is the birthplace of
- Baroque-era musicologist André Pirro
- Organist André Isoir
- Conductor Jean-Paul Penin
- Former world middleweight boxing champion Marcel Thil. A street is named in his honor.
See also 
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