| Date | Rouen | Le Havre |
| 1800-01-01 | 80755 | 19000 |
| 1806-01-01 | 86672 | 19482 |
| 1821-01-01 | 86736 | 20768 |
| 1831-01-01 | 88086 | 23816 |
| 1836-01-01 | 92083 | 25618 |
| 1841-01-01 | 96002 | 27154 |
| 1846-01-01 | 99295 | 31325 |
| 1851-01-01 | 100265 | 56964 |
| 1856-01-01 | 103223 | 64137 |
| 1861-01-01 | 102649 | 74336 |
| 1866-01-01 | 100671 | 60055 |
| 1872-01-01 | 102470 | 85825 |
| 1876-01-01 | 104902 | 92068 |
| 1881-01-01 | 105906 | 105867 |
| 1886-01-01 | 107163 | 112074 |
| 1891-01-01 | 112352 | 116369 |
| 1896-01-01 | 113219 | 119470 |
| 1901-01-01 | 116316 | 130196 |
| 1906-01-01 | 118459 | 132430 |
| 1911-01-01 | 124987 | 136159 |
| 1921-01-01 | 123712 | 163374 |
| 1926-01-01 | 122898 | 158022 |
| 1931-01-01 | 122957 | 165076 |
| 1936-01-01 | 122832 | 164083 |
| 1946-01-01 | 107739 | 106934 |
| 1954-01-01 | 116540 | 139810 |
| 1962-01-01 | 120857 | 185029 |
| 1968-01-01 | 120471 | 205236 |
| 1975-01-01 | 114834 | 217882 |
| 1982-01-01 | 101945 | 199388 |
| 1990-01-01 | 102723 | 195854 |
| 1999-01-01 | 106592 | 190905 |
| 2006-01-01 | 107904 | 182580 |
| 2011-01-01 | 111553 | 174156 |
| 2016-01-01 | 110117 | 170352 |
| 2021-01-01 | 114083 | 166058 |
| 2022-01-01 | 116331 | 166462 |
