| Martinsville City | |||
| 2000 Population Under 18 Years of Age | |||
| Total | Population | % Population | |
| Census Tract | Population | Under 18 Yrs. | Under 18 Yrs. |
| 1 | 3,672 | 803 | 21.9% |
| 2 | 2,879 | 728 | 25.3% |
| 3 | 2,860 | 536 | 18.7% |
| 4 | 2,841 | 726 | 25.6% |
| 5 | 3,164 | 685 | 21.6% |
| City Totals | 15,416 | 3,478 | 22.6% |
| Source: 2000 Census of Population & Housing, U.S. Census Bureau. | |||