|Canton||Chaumont-1, 2 and 3|
|Intercommunality||Agglomération de Chaumont 31987 hab.|
|• Mayor (2008–2014)||Christine Guillemy|
|55.26 km2 (21.34 sq mi)|
|• Density||430/km2 (1,100/sq mi)|
|Time zone||UTC+01:00 (CET)|
|• Summer (DST)||UTC+02:00 (CEST)|
|Elevation||247–416 m (810–1,365 ft) |
(avg. 314 m or 1,030 ft)
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.|
Historically the seat of the Counts of Bassigny and later of Champagne, Chaumont was the venue of an offensive treaty against Napoleon I signed by the United Kingdom, Austria, Prussia, and Russia in 1814. Chaumont was bombed in 1940 and 1944 during World War II. From 1951 to 1967, the United States Air Force under NATO operated the Chaumont-Semoutiers Air Base on the outskirts of the city.
- Edmé Bouchardon (1698–1762), sculptor
- Lucie Décosse (born 1981), judo player
- Nicole Rieu (born 1949), singer and director
- Luc Chatel (born 1964), politician
- Denis Decrès (1761–1820), Minister of the French Navy
- Jean Masson (1907–1964), politician
- Louise Michel (1830–1905), anarchist
- Christian Pineau (1904–1995), politician
- André Godard (1881-1965), architect and archaeologist
Lucien Lantier, painter, briefly stayed here in 1918 during the birth of his son.
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Chaumont is twinned with:
- "Populations légales 2016". INSEE. Retrieved 25 April 2019.