| | Norwood, MA | Rocklin, CA | United States |
| Population | 31,256 | 70,317 | 329,725,481 |
| Female Population | 50.2% | 50.8% | 50.5% |
| Male Population | 49.8% | 49.2% | 49.5% |
| Median Age | 39 | 37.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 28,652 | 57,482 | 309,327,143 |
| Population - 2000 | 28,587 | 36,330 | 285,036,114 |
| Population - 1990 | 28,700 | 19,033 | 251,960,433 |
| Pop. 2000 to Now | 4.0% | 93.1% | 15.6% |
| Pop. 1990 to Now | 3.6% | 268.6% | 30.8% |
| space4 | | | |
| Population Density | 3,014.7 | 3,549.6 | 93.4 |
| Land Area | 10.4 | 19.8 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Norwood, MA | Rocklin, CA | United States |
| Age 0 to 4 | 5.4% | 5.9% | 5.9% |
| Age 5 to 9 | 6.3% | 7.2% | 6.1% |
| Age 10 to 14 | 5.3% | 8.1% | 6.6% |
| Age 15 to 17 | 3.0% | 5.0% | 3.9% |
| Age 18 to 20 | 2.5% | 4.2% | 4.0% |
| Age 21 to 24 | 4.1% | 5.5% | 5.2% |
| Age 25 to 34 | 17.2% | 10.8% | 13.8% |
| Age 35 to 44 | 12.8% | 15.2% | 12.9% |
| Age 45 to 54 | 13.0% | 13.6% | 12.6% |
| Age 55 to 59 | 6.8% | 6.0% | 6.7% |
| Age 60 to 64 | 7.4% | 4.8% | 6.3% |
| Age 65 to 74 | 7.8% | 8.0% | 9.6% |
| Age 75 to 84 | 5.1% | 4.1% | 4.5% |
| Age 85 and over | 3.3% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Norwood, MA | Rocklin, CA | United States |
| White | 76.4% | 66.6% | 59.4% |
| Black | 6.6% | 1.7% | 12.2% |
| Asian | 5.2% | 11.0% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 1.9% | 0.7% | 0.4% |
| Two or More Races | 2.6% | 5.6% | 3.2% |
| Hispanic | 7.2% | 13.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Norwood, MA | Rocklin, CA | United States |
| Married Population | 51.9% | 57.7% | 49.8% |
| Currently Married | 49.2% | 56.6% | 48.0% |
| Married but Separated | 2.7% | 1.1% | 1.8% |
| Single Population | 48.1% | 42.3% | 50.2% |
| Never Married | 33.2% | 28.8% | 33.8% |
| Divorced | 9.0% | 9.1% | 10.8% |
| Widowed | 5.9% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 2.37 | 2.86 | 2.60 |
| Households | 13,002 | 24,179 | 124,010,992 |
| Family Households | 7,928 | 17,660 | 80,755,759 |
| Married couple, w/children | 33.2% | 44.5% | 30.5% |
| Married couple, no children | 42.4% | 39.2% | 42.9% |
| Non Family Households | 5,074 | 6,519 | 43,255,233 |
| Single householder, w/children | 12.7% | 8.5% | 15.8% |
| Single householder, no children | 11.6% | 7.8% | 10.8% |