| | Deerfield, MA | Fallston, MD | United States |
| Population | 5,090 | 9,696 | 329,725,481 |
| Female Population | 49.8% | 54.4% | 50.5% |
| Male Population | 50.2% | 45.6% | 49.5% |
| Median Age | 51.7 | 44.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,126 | 8,062 | 309,327,143 |
| Population - 2000 | 4,750 | 8,427 | 285,036,114 |
| Population - 1990 | 5,018 | 5,730 | 251,960,433 |
| Pop. 2000 to Now | 6.3% | 10.9% | 15.6% |
| Pop. 1990 to Now | 0.6% | 63.0% | 30.8% |
| space4 | | | |
| Population Density | 157.1 | 692.7 | 93.4 |
| Land Area | 32.4 | 14.0 | 3,531,905.4 |
| Water Area | 1.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Deerfield, MA | Fallston, MD | United States |
| Age 0 to 4 | 2.0% | 5.3% | 5.9% |
| Age 5 to 9 | 3.6% | 7.7% | 6.1% |
| Age 10 to 14 | 5.1% | 3.3% | 6.6% |
| Age 15 to 17 | 5.4% | 2.9% | 3.9% |
| Age 18 to 20 | 2.8% | 2.3% | 4.0% |
| Age 21 to 24 | 2.7% | 8.6% | 5.2% |
| Age 25 to 34 | 8.8% | 5.6% | 13.8% |
| Age 35 to 44 | 9.5% | 14.9% | 12.9% |
| Age 45 to 54 | 16.2% | 14.2% | 12.6% |
| Age 55 to 59 | 9.8% | 8.4% | 6.7% |
| Age 60 to 64 | 13.9% | 7.3% | 6.3% |
| Age 65 to 74 | 13.6% | 12.4% | 9.6% |
| Age 75 to 84 | 5.2% | 6.3% | 4.5% |
| Age 85 and over | 1.3% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Deerfield, MA | Fallston, MD | United States |
| White | 90.8% | 87.1% | 59.4% |
| Black | 0.5% | 2.0% | 12.2% |
| Asian | 0.1% | 3.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.7% | 1.4% | 3.2% |
| Hispanic | 4.9% | 6.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Deerfield, MA | Fallston, MD | United States |
| Married Population | 51.5% | 68.3% | 49.8% |
| Currently Married | 49.3% | 67.0% | 48.0% |
| Married but Separated | 2.2% | 1.2% | 1.8% |
| Single Population | 48.5% | 31.7% | 50.2% |
| Never Married | 34.3% | 22.9% | 33.8% |
| Divorced | 9.1% | 5.8% | 10.8% |
| Widowed | 5.1% | 3.0% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.93 | 2.60 |
| Households | 2,237 | 3,299 | 124,010,992 |
| Family Households | 1,353 | 2,866 | 80,755,759 |
| Married couple, w/children | 18.4% | 37.3% | 30.5% |
| Married couple, no children | 57.3% | 53.4% | 42.9% |
| Non Family Households | 884 | 433 | 43,255,233 |
| Single householder, w/children | 17.1% | 0.9% | 15.8% |
| Single householder, no children | 7.2% | 8.3% | 10.8% |