Census data for Melby parish
| 1787 | 37 | 625 | 317 | 50.72% | 308 | 49.28% | 0 | 0.00% | 0 |
| 1801 | 25 | 652 | 332 | 50.92% | 320 | 49.08% | 0 | 0.00% | 0 |
| 1834 | 21 | 898 | 475 | 52.90% | 423 | 47.10% | 0 | 0.00% | 0 |
| 1840 | 22 | 934 | 487 | 52.14% | 447 | 47.86% | 0 | 0.00% | 0 |
| 1845 | 32 | 1,004 | 518 | 51.59% | 486 | 48.41% | 0 | 0.00% | 0 |
| 1850 | 32 | 1,024 | 520 | 50.78% | 504 | 49.22% | 0 | 0.00% | 0 |
| 1855 | 56 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1860 | 31 | 1,093 | 537 | 49.13% | 555 | 50.78% | 1 | 0.09% | 0 |
| 1870 | 66 | 1,151 | 588 | 51.09% | 563 | 48.91% | 0 | 0.00% | 1,151 |
| 1880 | 86 | 1,127 | 571 | 50.67% | 556 | 49.33% | 0 | 0.00% | 0 |
| 1890 | 94 | 1,153 | 578 | 50.13% | 575 | 49.87% | 0 | 0.00% | 0 |
| 1901 | 784 | 1,192 | 580 | 48.66% | 612 | 51.34% | 0 | 0.00% | 686 |
| 1906 | 94 | 1,140 | 556 | 48.77% | 584 | 51.23% | 0 | 0.00% | 0 |
| 1911 | 109 | 3 | 2 | 66.67% | 1 | 33.33% | 0 | 0.00% | 0 |
| 1916 | 112 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1921 | 95 | 4 | 2 | 50.00% | 2 | 50.00% | 0 | 0.00% | 0 |
| 1925 | 104 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1930 | 80 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1940 | 1,175 | 3 | 2 | 66.67% | 1 | 33.33% | 0 | 0.00% | 0 |