| | Matfield Green, KS | Caldwell, KS | United States |
| Population | 39 | 862 | 329,725,481 |
| Female Population | 61.5% | 50.0% | 50.5% |
| Male Population | 38.5% | 50.0% | 49.5% |
| Median Age | 47.6 | 51.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 45 | 1,068 | 309,327,143 |
| Population - 2000 | 60 | 1,284 | 285,036,114 |
| Population - 1990 | 33 | 1,351 | 251,960,433 |
| Pop. 2000 to Now | -30.0% | -24.3% | 15.6% |
| Pop. 1990 to Now | 27.3% | -28.1% | 30.8% |
| space4 | | | |
| Population Density | 274.7 | 806.4 | 93.4 |
| Land Area | 0.1 | 1.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Matfield Green, KS | Caldwell, KS | United States |
| Age 0 to 4 | 0.0% | 2.4% | 5.9% |
| Age 5 to 9 | 15.4% | 7.0% | 6.1% |
| Age 10 to 14 | 12.8% | 7.5% | 6.6% |
| Age 15 to 17 | 0.0% | 3.4% | 3.9% |
| Age 18 to 20 | 0.0% | 2.8% | 4.0% |
| Age 21 to 24 | 0.0% | 1.0% | 5.2% |
| Age 25 to 34 | 5.1% | 10.1% | 13.8% |
| Age 35 to 44 | 0.0% | 11.7% | 12.9% |
| Age 45 to 54 | 33.3% | 10.1% | 12.6% |
| Age 55 to 59 | 2.6% | 9.4% | 6.7% |
| Age 60 to 64 | 2.6% | 7.1% | 6.3% |
| Age 65 to 74 | 23.1% | 14.5% | 9.6% |
| Age 75 to 84 | 5.1% | 9.4% | 4.5% |
| Age 85 and over | 0.0% | 3.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Matfield Green, KS | Caldwell, KS | United States |
| White | 100.0% | 89.9% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 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 | 0.0% | 6.8% | 3.2% |
| Hispanic | 0.0% | 3.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Matfield Green, KS | Caldwell, KS | United States |
| Married Population | 53.6% | 45.1% | 49.8% |
| Currently Married | 53.6% | 43.9% | 48.0% |
| Married but Separated | 0.0% | 1.3% | 1.8% |
| Single Population | 46.4% | 54.9% | 50.2% |
| Never Married | 7.1% | 21.0% | 33.8% |
| Divorced | 28.6% | 17.9% | 10.8% |
| Widowed | 10.7% | 16.1% | 5.6% |
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| Household Size | 1.95 | 1.90 | 2.60 |
| Households | 20 | 446 | 124,010,992 |
| Family Households | 7 | 207 | 80,755,759 |
| Married couple, w/children | 71.4% | 18.4% | 30.5% |
| Married couple, no children | 28.6% | 56.5% | 42.9% |
| Non Family Households | 13 | 239 | 43,255,233 |
| Single householder, w/children | 0.0% | 16.9% | 15.8% |
| Single householder, no children | 0.0% | 8.2% | 10.8% |