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Folketællinger i Holbæk Købstad
| 1787 | 42 | 1.199 | 576 | 48,04% | 623 | 51,96% | 0 | 0,00% | 0 |
| 1801 | 59 | 1.332 | 677 | 50,83% | 655 | 49,17% | 0 | 0,00% | 0 |
| 1834 | 62 | 2.007 | 1.034 | 51,52% | 973 | 48,48% | 0 | 0,00% | 0 |
| 1840 | 65 | 2.110 | 1.121 | 53,13% | 989 | 46,87% | 0 | 0,00% | 0 |
| 1845 | 65 | 2.351 | 1.195 | 50,83% | 1.156 | 49,17% | 0 | 0,00% | 0 |
| 1850 | 102 | 2.638 | 1.317 | 49,92% | 1.319 | 50,00% | 2 | 0,08% | 103 |
| 1855 | 122 | 635 | 318 | 50,08% | 295 | 46,46% | 22 | 3,46% | 0 |
| 1860 | 105 | 2.971 | 1.452 | 48,87% | 1.519 | 51,13% | 0 | 0,00% | 0 |
| 1870 | 484 | 7 | 5 | 71,43% | 2 | 28,57% | 0 | 0,00% | 0 |
| 1880 | 596 | 3.288 | 1.594 | 48,48% | 1.694 | 51,52% | 0 | 0,00% | 1.773 |
| 1890 | 1.066 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1901 | 1.295 | 4.620 | 2.188 | 47,36% | 2.432 | 52,64% | 0 | 0,00% | 4.311 |
| 1906 | 1.568 | 5.332 | 2.524 | 47,34% | 2.808 | 52,66% | 0 | 0,00% | 0 |
| 1911 | 1.785 | 21 | 10 | 47,62% | 10 | 47,62% | 1 | 4,76% | 0 |
| 1916 | 2.785 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1921 | 3.088 | 14 | 4 | 28,57% | 9 | 64,29% | 1 | 7,14% | 0 |
| 1925 | 4.872 | 0 | 0 | 0,00% | 0 | 0,00% | 0 | 0,00% | |
| 1930 | 8.898 | 12.968 | 6.339 | 48,88% | 6.626 | 51,10% | 3 | 0,02% | 12.543 |
| 1940 | 8.944 | 247 | 116 | 46,96% | 131 | 53,04% | 0 | 0,00% | 0 |
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