| Fairfax Town - Population Change | FIPS Code=11025 |
| Absolute Population Change, 1970-1980 | 439 |
| Per Cent Population Change, 1970-1980 | 32.14 |
| Absolute Population Change, 1980-1990 | 681 |
| Per Cent Population Change, 1980-1990 | 37.73 |
| Population Estimate, 1996 | 2934 |
| Population Estimate, 2000 | 3258 |
| Population Estimate, 2005 | 3699 |
| Population Estimate, 2010 | 4118 |
| Population Estimate, 2015 | 4569 |
| Absolute Population Change, 1990-1996 | 448 |
| Per Cent Population Change, 1990-1996 | 18.02 |
| Absolute Population Change, 1996-2005 | 765 |
| Per Cent Population Change, 1996-2005 | 26.07 |
| Absolute Population Change, 2005-2015 | 870 |
| Per Cent Population Change, 2005-2015 | 23.52 |