French Cerdagne (Catalan: Alta Cerdanya, IPA: [ˈaltə səɾˈðaɲə]) is the northern half of Cerdanya, which came under French control as a result of the Treaty of the Pyrenees in 1659, while the southern half remained in Spain (as part of Catalonia). Catalans often refer to French Cerdagne as Upper Cerdanya (Catalan: Alta Cerdanya). It is the only French territory on the Iberian Peninsula, as it is located on the south side of the Pyrenees Range between France and Spain. For example, the Segre river, which goes west and then south to meet the Ebro, has its source in the French Cerdagne. An inadvertent result of the Treaty of the Pyrenees is the Spanish exclave of Llívia (the small uncolored area in the map) which is sovereign Spanish territory surrounded by French Cerdagne.
French Cerdagne has no special status inside France, simply forming an area within the department of Pyrénées-Orientales, unlike the Spanish part of Cerdanya, which is officially a Catalan comarca called simply Cerdanya. In France, the French area is referred to as either Cerdagne française (i.e. "French Cerdagne"), Haute-Cerdagne (i.e. "Upper Cerdagne") or just Cerdagne.
French Cerdagne has a land area of 539.67 km² (208.37 sq. miles). Its 1999 population was 12,035, resulting in a density of only 22 people per km² (58 per sq. mile).
French Cerdagne has the most cloud-free days in France, and was therefore chosen as the place to build:
Population at the 1999 French Census.
- Angoustrine-Villeneuve-des-Escaldes (Catalan: Angostrina) – pop. 549
- Bolquère (Catalan: Bolquera) – pop. 730 (779 at 2004 census)
- Bourg-Madame (Catalan: La Guingueta d’Ix) – pop. 1,166 (1,198 at 2004 census)
- Dorres – pop. 219
- Égat (Catalan Èguet) – pop. 494 (475 at 2004 census)
- Enveitg (Catalan Enveig) – pop. 621
- Err (Catalan Er) – pop. 551
- Estavar – pop. 409
- Eyne (Catalan Eina) – pop. 127 (161 at 2004 census)
- Font-Romeu-Odeillo-Via (Catalan Font-Romeu, Odelló i Vià) – pop. 2,003
- La Cabanasse (Catalan La Cabanassa) – pop. 622 (756 at 2004 census)
- Latour-de-Carol (Catalan La Tor de Querol) – pop. 367
- Llo – pop. 133
- Mont-Louis (Catalan Montlluís) – pop. 270
- Nahuja (Catalan Naüja) – pop. 63
- Osséja (Catalan Osseja) – pop. 1,282
- Palau-de-Cerdagne (Catalan Palau de Cerdanya) – pop. 424 (496 at 2004 census)
- Planès – pop. 27
- Porta – pop. 98
- Porté-Puymorens (Catalan Portè) – pop. 147
- Saillagouse (Catalan Sallagosa) – pop. 820
- Sainte-Léocadie (Catalan Santa Llocaia) – pop. 140
- Saint-Pierre-dels-Forcats (Catalan Sant Pere dels Forcats) – pop. 213
- Targassonne (Catalan Targasona) – pop. 203 (194 at 2004 census)
- Ur – pop. 308
- Valcebollère (Catalan: Vallsabollera) – pop. 49