Cayenne
2012 aerial view of Cayenne
Location of the commune (in red) within French Guiana
Administration
Country	France
Overseas region and department	French Guiana
Arrondissement	Cayenne
Intercommunality	Centre Littoral
Mayor	Sandra Trochimara (2020-)
Statistics
Land area1	23.60 km2 (9.11 sq mi)
Population2	55,198  (Jan. 2012)
- Density	2,339/km2 (6,060/sq mi)
Urban area	206.9 km2 (79.9 sq mi) (2010)
- Population	106,358 (Jan. 2012)
Metro area	5,087 km2 (1,964 sq mi) (2010)
- Population	121,308 (Jan. 2012)
INSEE/Postal code	97302/ 97300
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.
2Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.

Cayenne is a commune, the capital (prefecture) of the French Guiana, an overseas region and department of France that is in northern South America. The city is on a former island at the mouth of the Cayenne river on the Atlantic coast.