Census data for Frøs Herred
| 1769 | 4 | 0 | 218 | 103 | 47.25% | 115 | 52.75% | 0 | 0.00% | 218 |
| 1787 | 9 | 17 | 219 | 116 | 52.97% | 103 | 47.03% | 0 | 0.00% | 0 |
| 1801 | 9 | 216 | 5,686 | 2,736 | 48.12% | 2,949 | 51.86% | 1 | 0.02% | 31 |
| 1803 | 9 | 20 | 475 | 239 | 50.32% | 236 | 49.68% | 0 | 0.00% | 475 |
| 1834 | 9 | 29 | 531 | 257 | 48.40% | 274 | 51.60% | 0 | 0.00% | 0 |
| 1835 | 9 | 105 | 3,049 | 1,409 | 46.21% | 1,585 | 51.98% | 55 | 1.80% | 1,646 |
| 1840 | 9 | 196 | 1,480 | 723 | 48.85% | 757 | 51.15% | 0 | 0.00% | 0 |
| 1845 | 9 | 94 | 3,427 | 1,656 | 48.32% | 1,771 | 51.68% | 0 | 0.00% | 2,690 |
| 1850 | 9 | 33 | 689 | 322 | 46.73% | 367 | 53.27% | 0 | 0.00% | 0 |
| 1855 | 9 | 260 | 2,366 | 952 | 40.24% | 941 | 39.77% | 473 | 19.99% | 506 |
| 1860 | 9 | 284 | 9,920 | 4,986 | 50.26% | 4,934 | 49.74% | 0 | 0.00% | 2,517 |
| 1880 | 9 | 18 | 0 | 0 | 0.00% | 0 | 0.00% | 0 | 0.00% | |
| 1921 | 9 | 1,192 | 2,091 | 1,053 | 50.36% | 1,037 | 49.59% | 1 | 0.05% | 0 |
| 1925 | 9 | 1,147 | 1,624 | 825 | 50.80% | 799 | 49.20% | 0 | 0.00% | 0 |
| 1930 | 9 | 950 | 959 | 496 | 51.72% | 463 | 48.28% | 0 | 0.00% | 1 |
| 1940 | 9 | 6,004 | 764 | 411 | 53.80% | 353 | 46.20% | 0 | 0.00% | 0 |