Demographics for Marshall County Tennessee
| Population | 2005 Estimate | 2010 Estimate | |
| Belfast (37019) | 685 | 715 | |
| Chapel Hill (37034) | 5,297 | 5,630 | |
| Cornersville (37047) | 2,388 | 2,424 | |
| Lewisburg (37091) | 19,899 | 20,759 | |
| Petersburg (37144) | 3,114 | 3,251 | |
| Marshall County | 27,828 | 28,966 | |
| Region | 565,537 | 631,521 | |
| Tennessee | 5,915,950 | 6,159,360 |
Source: 2006 Claritas Inc., All Rights Reserved, (800)866-6511
| Ethnicity | White | Black | Other |
| Belfast (37019) | 94.2% | 3.2% | 2.6% |
| Chapel Hill (37034) | 96% | 2% | 2% |
| Cornersville (37047) | 97.2% | 1.7% | 1.1% |
| Lewisburg (37091) | 87% | 9.3% | 3.7% |
| Petersburg (37144) | 95.5% | 2.4% | 2.1% |
| Marshall County | 89.7% | 7.1% | 3.2% |
| Region | 86.3% | 8.7% | 5% |
| Tennessee | 79.2% | 16.7% | 4.1% |
| Age Comparison | Marshall County | Region | Tennessee |
| 0 - 17 years | 6,787 | 142,567 | 635,601 |
| 18 - 24 years | 2,562 | 58,182 | 575,310 |
| 25 - 44 years | 7,779 | 167,193 | 1,693,657 |
| 45 - 64 years | 7,238 | 134,833 | 1,495,129 |
| 65 years and older | 3,462 | 57,405 | 754,891 |
