| Year | Township | Notes: |
| 1820 | Cambria | 108 families-- 604 individuals |
| 1830 | Cambria | 126 families-- 736 individuals |
| Jackson | 79 families-- 440 individuals | |
| 1840 | Cambria | 201 families--1,156 individuals |
| Carroll | 121 families--696 individuals | |
| Jackson | 101 families--623 individuals | |
| 1850 | Cambria | 244 families--1,400 individuals |
| Carroll | 200 families--1,128 individuals | |
| Jackson | 150 families--832 individuals | |
| 1860 | Blacklick | 115 families--659 individuals |
| 1870 | Blacklick | 114 families--646 individuals |
| 1880 | Blacklick | 113 families--587 indivuduals |
| 1900 | Blacklick | 263 families--1,611 individuals |
| 1910 | Blacklick (Part 1) | 250 families--1,599 individuals |
| Blacklick (Part 2) | 305 families--1,591 individuals | |
| 1920 | Blacklick (E.D. 138) | 134 families--693 individuals |
| Blacklick (E.D. 139) | 305 families--1,683 individuals | |
| 1930 | Blacklick (Villlage of Twin Rocks) | 237 families-- 1,262 individuals |
| Blacklick (Excluding Twin Rocks) | 232 families -- 1,266 individuals |
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