| PEOPLE | Mahwah Township | San Mateo | United States |
| Population | 25,890 | 97,207 | 308,035,306 |
| Pop. Density | 1,008 | 8,014 | 87 |
| Pop. Change | 7.58% | 5.16% | 8.07% |
| Median Age | 40.3 | 38.9 | 37.3 |
| Households | 9,505 | 38,233 | 116,716,292 |
| Household Size | 2.42 | 2.51 | 2.58 |
| Male Population | 46.55% | 48.83% | 49.27% |
| Female Population | 53.45% | 51.17% | 50.96% |
| Married Population | 54.83% | 46.97% | 47.02% |
| Single Population | 45.17% | 53.03% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.18% | 6.78% | 6.56% |
| Age 5 to 9 | 5.40% | 5.72% | 6.61% |
| Age 10 to 14 | 6.44% | 5.11% | 6.71% |
| Age 15 to 17 | 3.82% | 3.23% | 4.21% |
| Age 18 to 20 | 5.99% | 1.87% | 2.95% |
| Age 21 to 24 | 10.20% | 5.25% | 7.01% |
| Age 25 to 34 | 8.43% | 15.55% | 13.33% |
| Age 35 to 44 | 11.90% | 16.11% | 13.33% |
| Age 45 to 49 | 16.99% | 14.65% | 14.61% |
| Age 50 to 54 | 16.99% | 14.65% | 14.61% |
| Age 55 to 59 | 12.44% | 11.36% | 11.84% |
| Age 60 to 64 | 12.44% | 11.36% | 11.84% |
| Age 65 to 74 | 8.00% | 6.68% | 7.05% |
| Age 75 to 84 | 4.75% | 4.77% | 4.24% |
| Age 85 and over | 1.46% | 2.94% | 1.78% |
| RACE | | | |
| White | 85.67% | 57.83% | 72.41% |
| Black | 2.62% | 2.36% | 12.61% |
| Asian | 7.81% | 18.91% | 4.75% |
| American Indian | 0.56% | 0.52% | 0.95% |
| Other | 3.34% | 20.38% | 9.28% |
| Hispanic | 1.37% | 19.15% | 16.35% |
| Non-Hispanic | 98.63% | 80.85% | 83.65% |
| FAMILY | | | |
| Married, w/children | 36.57% | 34.91% | 30.42% |
| Married, no children | 45.75% | 41.72% | 42.46% |
| Single, w/children | 7.45% | 10.09% | 14.39% |
| Single, no children | 10.22% | 13.29% | 12.73% |
| Divorced | 8.92% | 10.79% | 10.62% |
| Separated | 3.34% | 5.63% | 4.97% |
| Widowed | 4.99% | 7.04% | 6.14% |
| Now Married | 54.48% | 46.32% | 46.32% |
| Never Married | 28.28% | 30.23% | 31.95% |
