Bion (French pronunciation: [bjɔ̃]) is a former commune in the Manche department in the Normandy region in northwestern France. On 1 January 2016, it was merged into the new commune of Mortain-Bocage.

Historical population

Year Pop. ±% 1793 720 —     1800 826 +14.7% 1806 754 −8.7% 1821 820 +8.8% 1831 779 −5.0% 1836 854 +9.6% 1841 805 −5.7% 1846 806 +0.1% 1851 870 +7.9% 1856 781 −10.2% 1861 744 −4.7% 1866 729 −2.0% 1872 692 −5.1% 1876 687 −0.7% 1881 629 −8.4% 1886 615 −2.2% 1891 614 −0.2%

Year Pop. ±% 1896 598 −2.6% 1901 564 −5.7% 1906 529 −6.2% 1911 521 −1.5% 1921 504 −3.3% 1926 485 −3.8% 1931 453 −6.6% 1936 450 −0.7% 1946 426 −5.3% 1954 474 +11.3% 1962 395 −16.7% 1968 394 −0.3% 1975 408 +3.6% 1982 471 +15.4% 1990 488 +3.6% 1999 431 −11.7% 2009 391 −9.3%

• Communes of the Manche department
• Parc naturel régional Normandie-Maine