| Statistic | Plymouth | Utah | National |
| Population | 364 | 3,205,958 | 328,239,523 |
| Population density (sq mi) | 440 | 40 | 91 |
| Median age | 40.4 | 30.3 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 69% | 60% | 55% |
| Families w/ Kids under 18 | 39% | 51% | 43% |
| Speak English | 97% | 85% | 79% |
| Speak Spanish | 3% | 10% | 13% |
| Race | Plymouth | Utah | National |
| White | 90.11% | 87.25% | 73.35% |
| Black | 0.00% | 1.10% | 12.63% |
| Asian | 0.00% | 2.24% | 5.22% |
| American Indian | 3.85% | 1.07% | 0.82% |
| Native Hawaiian | 0.00% | 0.90% | 0.18% |
| Mixed race | 1.37% | 2.64% | 3.06% |
| Other race | 4.67% | 4.79% | 4.75% |
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