Chastanier is a village and commune in the Lozère department in southern France.

Historical population of Chastanier

Year Pop. ±% 1793 250 —     1800 230 −8.0% 1806 212 −7.8% 1821 240 +13.2% 1831 242 +0.8% 1836 260 +7.4% 1841 242 −6.9% 1846 258 +6.6% 1851 270 +4.7% 1856 292 +8.1% 1861 286 −2.1% 1866 273 −4.5% 1872 261 −4.4% 1876 257 −1.5% 1881 283 +10.1% 1886 299 +5.7% 1891 261 −12.7% 1896 289 +10.7%	Year Pop. ±% 1901 257 −11.1% 1906 271 +5.4% 1911 269 −0.7% 1921 278 +3.3% 1926 288 +3.6% 1931 251 −12.8% 1936 240 −4.4% 1946 206 −14.2% 1954 181 −12.1% 1962 169 −6.6% 1968 140 −17.2% 1975 118 −15.7% 1982 106 −10.2% 1990 113 +6.6% 1999 89 −21.2% 2007 92 +3.4% 2012 94 +2.2% 2017 78 −17.0%
Source: Cassini and INSEE

The Chapeauroux forms part of the commune's south-western border, flows northward through the middle of the commune, then forms part of its north-western border. Good place for fishing and enjoy outdoor sports such as VTT and running.

• Communes of the Lozère department