The inhabitants of the commune are known as Fonsorbais.
Historical population
Year
Pop.
±% p.a.
1793
510
—
1800
531
+0.58%
1806
606
+2.23%
1821
661
+0.58%
1831
675
+0.21%
1836
733
+1.66%
1841
754
+0.57%
1846
806
+1.34%
1851
856
+1.21%
1856
825
−0.74%
1861
868
+1.02%
1866
827
−0.96%
1872
841
+0.28%
1876
870
+0.85%
1881
879
+0.21%
1886
870
−0.21%
1891
864
−0.14%
1896
835
−0.68%
Year
Pop.
±% p.a.
1901
782
−1.30%
1906
653
−3.54%
1911
642
−0.34%
1921
564
−1.29%
1926
572
+0.28%
1931
560
−0.42%
1936
528
−1.17%
1946
562
+0.63%
1954
650
+1.84%
1962
755
+1.89%
1968
882
+2.63%
1975
2,049
+12.80%
1982
3,241
+6.77%
1990
4,252
+3.45%
1999
6,909
+5.54%
2007
10,891
+5.85%
2012
11,828
+1.66%
2017
11,743
−0.14%
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