Census data for Alsønderup parish
| 1787 | 17 | 489 | 237 | 48.47% | 252 | 51.53% | 0 | 0.00% | 0 |
| 1801 | 27 | 643 | 318 | 49.46% | 325 | 50.54% | 0 | 0.00% | 0 |
| 1834 | 25 | 1,014 | 504 | 49.70% | 510 | 50.30% | 0 | 0.00% | 0 |
| 1840 | 28 | 1,081 | 539 | 49.86% | 542 | 50.14% | 0 | 0.00% | 0 |
| 1845 | 39 | 1,146 | 565 | 49.30% | 581 | 50.70% | 0 | 0.00% | 0 |
| 1850 | 29 | 1,232 | 591 | 47.97% | 640 | 51.95% | 1 | 0.08% | 0 |
| 1855 | 36 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1860 | 25 | 1,273 | 613 | 48.15% | 660 | 51.85% | 0 | 0.00% | 0 |
| 1870 | 76 | 1,342 | 654 | 48.73% | 688 | 51.27% | 0 | 0.00% | 1,342 |
| 1880 | 97 | 1,340 | 651 | 48.58% | 689 | 51.42% | 0 | 0.00% | 0 |
| 1890 | 97 | 1,196 | 603 | 50.42% | 593 | 49.58% | 0 | 0.00% | 0 |
| 1901 | 761 | 1,071 | 546 | 50.98% | 525 | 49.02% | 0 | 0.00% | 0 |
| 1906 | 81 | 877 | 448 | 51.08% | 429 | 48.92% | 0 | 0.00% | 0 |
| 1911 | 90 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1916 | 86 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1921 | 76 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1925 | 86 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1930 | 63 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1940 | 629 | 12 | 8 | 66.67% | 4 | 33.33% | 0 | 0.00% | 0 |