| Westminster Town - Population Change | FIPS Code=25095 |
| Absolute Population Change, 1970-1980 | 618 |
| Per Cent Population Change, 1970-1980 | 32.96 |
| Absolute Population Change, 1980-1990 | 533 |
| Per Cent Population Change, 1980-1990 | 21.38 |
| Population Estimate, 1996 | 3155 |
| Population Estimate, 2000 | 3609 |
| Population Estimate, 2005 | 3855 |
| Population Estimate, 2010 | 4103 |
| Population Estimate, 2015 | 4330 |
| Absolute Population Change, 1990-1996 | 129 |
| Per Cent Population Change, 1990-1996 | 4.26 |
| Absolute Population Change, 1996-2005 | 700 |
| Per Cent Population Change, 1996-2005 | 22.19 |
| Absolute Population Change, 2005-2015 | 475 |
| Per Cent Population Change, 2005-2015 | 12.32 |