Population and Housing Statistics- Huntsville MPO Study Area
| Population 2000 | Population 2010 | Population 2020 | Housing Units 2000 | Housing Units 2010 | Housing Units 2020 | |
| Huntsville | 158,216 | 180,105 | 215,006 | 73,670 | 84,949 | 100,391 |
| Madison | 29,329 | 42,938 | 56,933 | 12,121 | 17,203 | 21,980 |
| Owens Cross Roads | 1,124 | 1,521 | 2,594 | 482 | 650 | 1,032 |
| Triana | 458 | 496 | 2,890 | 176 | 227 | 1,180 |
| Madison County (unincorporated) | 84,158 | 106,140 | 122,622 | 32,336 | 41,788 | 49,182 |
| Limestone County (unincorporated) | 7,102 | 10,100 | 12,885 | 2,094 | 3,252 | 4,323 |
| Total | 280,387 | 341,300 | 412,930 | 120,879 | 148,069 | 178,088 |