| Statistic | Marion | Louisiana | National |
| Population | 675 | 4,648,794 | 328,239,523 |
| Population density (sq mi) | 210 | 108 | 91 |
| Median age | 50.5 | 36.2 | 37.7 |
| Male/Female ratio | 0.7:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 51% | 52% | 55% |
| Families w/ Kids under 18 | 18% | 43% | 43% |
| Speak English | 99% | 92% | 79% |
| Speak Spanish | 0% | 4% | 13% |
| Race | Marion | Louisiana | National |
| White | 45.63% | 62.62% | 73.35% |
| Black | 53.48% | 32.16% | 12.63% |
| Asian | 0.00% | 1.69% | 5.22% |
| American Indian | 0.00% | 0.57% | 0.82% |
| Native Hawaiian | 0.00% | 0.03% | 0.18% |
| Mixed race | 0.89% | 1.83% | 3.06% |
| Other race | 0.00% | 1.09% | 4.75% |
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