Lys, Pyrénées-Atlantiques Population Population

| _1861 | _1866 | _1872 | _1876 | _1881 | _1886 | _1891 |
|---|---|---|---|---|---|---|
| 1080 | 1070 | 1084 | 1040 | 962 | 985 | 998 |
| 1906 | 1911 | 1921 | 1926 | 1931 | 1936 | 1946 |
| 908 | 856 | 685 | 657 | 622 | 621 | 564 |
| 1968 | 1975 | 1982 | 1990 | 1999 | 2006 | 2007 |
| 450 | 430 | 412 | 376 | 348 | 353 | 354 |