| Statistic | Greycliff | Montana | National |
| Population | 133 | 1,068,778 | 328,239,523 |
| Population density (sq mi) | 261 | 7 | 91 |
| Median age | 39.5 | 39.8 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 74% | 58% | 55% |
| Families w/ Kids under 18 | 77% | 40% | 43% |
| Speak English | 100% | 96% | 79% |
| Speak Spanish | 0% | 1% | 13% |
| Race | Greycliff | Montana | National |
| White | 52.63% | 89.11% | 73.35% |
| Black | 0.00% | 0.42% | 12.63% |
| Asian | 6.77% | 0.73% | 5.22% |
| American Indian | 0.00% | 6.57% | 0.82% |
| Native Hawaiian | 0.00% | 0.08% | 0.18% |
| Mixed race | 40.60% | 2.59% | 3.06% |
| Other race | 0.00% | 0.50% | 4.75% |
Here are the best places to live in Montana
These are the 10 cheapest cities in Montana
Check out the 10 most dangerous cities in Montana
Check out the 10 safest cities in Montana