| | Northampton, MA | Boulder, CO | United States |
| | 28,548 | 106,271 | 321,004,407 |
| | 56.0% | 47.9% | 50.8% |
| | 44.0% | 52.1% | 49.2% |
| | 39.4 | 28.6 | 37.8 |
| space3 | | | |
| | 28,709 | 97,050 | 308,745,538 |
| | 28,978 | 94,673 | 285,036,114 |
| | 29,289 | 83,312 | 251,960,433 |
| | -1.5% | 12.3% | 12.6% |
| | -2.5% | 27.6% | 27.4% |
| space4 | | | |
| | 833.6 | 4,042.4 | 90.9 |
| | 34.2 | 26.3 | 3,531,905.4 |
| | 1.5 | 1.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Northampton, MA | Boulder, CO | United States |
| | 3.6% | 3.4% | 6.2% |
| | 5.3% | 3.8% | 6.4% |
| | 4.9% | 3.7% | 6.5% |
| | 3.0% | 2.1% | 3.9% |
| | 8.4% | 14.9% | 4.1% |
| | 7.8% | 15.1% | 5.6% |
| | 12.8% | 16.1% | 13.7% |
| | 10.4% | 11.4% | 12.7% |
| | 13.1% | 9.9% | 13.4% |
| | 7.9% | 4.3% | 6.7% |
| | 6.7% | 4.9% | 6.0% |
| | 9.8% | 6.0% | 8.6% |
| | 3.8% | 2.7% | 4.4% |
| | 2.4% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Northampton, MA | Boulder, CO | United States |
| | 81.1% | 81.0% | 61.5% |
| | 2.5% | 1.0% | 12.3% |
| | 5.2% | 5.3% | 5.3% |
| | 0.0% | 0.2% | 0.7% |
| | 0.0% | 0.1% | 0.2% |
| | 0.0% | 0.3% | 0.2% |
| | 2.6% | 2.9% | 2.3% |
| | 8.7% | 9.3% | 17.6% |
| space2 | | | |
| Marriage & Family | | | |
| | Northampton, MA | Boulder, CO | United States |
| | 38.3% | 33.5% | 50.2% |
| | 36.8% | 32.8% | 48.2% |
| | 1.5% | 0.7% | 2.0% |
| | 61.7% | 66.5% | 49.8% |
| | 44.9% | 55.2% | 33.1% |
| | 11.8% | 8.6% | 10.9% |
| | 5.0% | 2.7% | 5.8% |
| space5 | | | |
| | 2.18 | 2.25 | 2.63 |
| | 11,406 | 42,679 | 118,825,921 |
| | 5,796 | 17,967 | 78,298,703 |
| | 29.2% | 34.3% | 31.1% |
| | 43.5% | 46.6% | 42.3% |
| | 5,610 | 24,712 | 40,527,218 |
| | 16.8% | 10.1% | 16.3% |
| | 10.6% | 8.9% | 10.3% |