| Rocklin, CA | Erie, CO | United States |
Population | 70,317 | 29,367 | 329,725,481 |
Female Population | 50.8% | 49.9% | 50.5% |
Male Population | 49.2% | 50.1% | 49.5% |
Median Age | 37.1 | 37.1 | 38.4 |
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Population - 2010 | 57,482 | 18,395 | 309,327,143 |
Population - 2000 | 36,330 | 6,291 | 285,036,114 |
Population - 1990 | 19,033 | 1,258 | 251,960,433 |
Pop. 2000 to Now | 93.1% | 381.9% | 15.6% |
Pop. 1990 to Now | 268.6% | 2,310.0% | 30.8% |
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Population Density | 3,549.6 | 1,495.1 | 93.4 |
Land Area | 19.8 | 19.6 | 3,531,905.4 |
Water Area | 0.0 | 0.1 | 264,836.8 |
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Est. Total Population By Age | | | |
| Rocklin, CA | Erie, CO | United States |
Age 0 to 4 | 5.9% | 7.8% | 5.9% |
Age 5 to 9 | 7.2% | 9.0% | 6.1% |
Age 10 to 14 | 8.1% | 9.5% | 6.6% |
Age 15 to 17 | 5.0% | 4.8% | 3.9% |
Age 18 to 20 | 4.2% | 1.8% | 4.0% |
Age 21 to 24 | 5.5% | 3.1% | 5.2% |
Age 25 to 34 | 10.8% | 11.0% | 13.8% |
Age 35 to 44 | 15.2% | 17.7% | 12.9% |
Age 45 to 54 | 13.6% | 14.8% | 12.6% |
Age 55 to 59 | 6.0% | 6.1% | 6.7% |
Age 60 to 64 | 4.8% | 4.9% | 6.3% |
Age 65 to 74 | 8.0% | 6.1% | 9.6% |
Age 75 to 84 | 4.1% | 2.9% | 4.5% |
Age 85 and over | 1.7% | 0.6% | 1.9% |
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Race | | | |
| Rocklin, CA | Erie, CO | United States |
White | 66.6% | 81.9% | 59.4% |
Black | 1.7% | 0.0% | 12.2% |
Asian | 11.0% | 5.4% | 5.6% |
Native American | 0.4% | 0.1% | 0.6% |
Hawaiian, Pacific Islander | 0.2% | 0.1% | 0.2% |
Other | 0.7% | 0.1% | 0.4% |
Two or More Races | 5.6% | 3.2% | 3.2% |
Hispanic | 13.9% | 9.3% | 18.4% |
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Marriage & Family | | | |
| Rocklin, CA | Erie, CO | United States |
Married Population | 57.7% | 66.3% | 49.8% |
Currently Married | 56.6% | 65.9% | 48.0% |
Married but Separated | 1.1% | 0.3% | 1.8% |
Single Population | 42.3% | 33.7% | 50.2% |
Never Married | 28.8% | 22.8% | 33.8% |
Divorced | 9.1% | 7.8% | 10.8% |
Widowed | 4.4% | 3.1% | 5.6% |
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Household Size | 2.86 | 2.97 | 2.60 |
Households | 24,179 | 9,879 | 124,010,992 |
Family Households | 17,660 | 7,969 | 80,755,759 |
Married couple, w/children | 44.5% | 49.7% | 30.5% |
Married couple, no children | 39.2% | 36.8% | 42.9% |
Non Family Households | 6,519 | 1,910 | 43,255,233 |
Single householder, w/children | 8.5% | 9.5% | 15.8% |
Single householder, no children | 7.8% | 4.1% | 10.8% |