| | Martin, SD | Kyle, SD | United States |
| Population | 1,212 | 1,398 | 329,725,481 |
| Female Population | 53.0% | 52.1% | 50.5% |
| Male Population | 47.0% | 47.9% | 49.5% |
| Median Age | 25.8 | 23.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,069 | 1,018 | 309,327,143 |
| Population - 2000 | 1,106 | 970 | 285,036,114 |
| Population - 1990 | 1,151 | 914 | 251,960,433 |
| Pop. 2000 to Now | -4.3% | -20.1% | 15.6% |
| Pop. 1990 to Now | -8.1% | -15.2% | 30.8% |
| space4 | | | |
| Population Density | 2,160.4 | 948.4 | 93.4 |
| Land Area | 0.6 | 1.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Martin, SD | Kyle, SD | United States |
| Age 0 to 4 | 9.9% | 4.2% | 5.9% |
| Age 5 to 9 | 15.7% | 14.9% | 6.1% |
| Age 10 to 14 | 8.6% | 22.2% | 6.6% |
| Age 15 to 17 | 8.6% | 3.5% | 3.9% |
| Age 18 to 20 | 3.1% | 2.9% | 4.0% |
| Age 21 to 24 | 3.3% | 11.4% | 5.2% |
| Age 25 to 34 | 11.5% | 14.9% | 13.8% |
| Age 35 to 44 | 11.2% | 5.7% | 12.9% |
| Age 45 to 54 | 4.5% | 6.1% | 12.6% |
| Age 55 to 59 | 3.4% | 7.2% | 6.7% |
| Age 60 to 64 | 6.2% | 1.8% | 6.3% |
| Age 65 to 74 | 5.8% | 3.3% | 9.6% |
| Age 75 to 84 | 4.8% | 2.0% | 4.5% |
| Age 85 and over | 3.5% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Martin, SD | Kyle, SD | United States |
| White | 40.5% | 4.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 2.8% | 0.0% | 5.6% |
| Native American | 30.9% | 93.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 9.6% | 0.0% | 3.2% |
| Hispanic | 16.2% | 2.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Martin, SD | Kyle, SD | United States |
| Married Population | 32.8% | 16.0% | 49.8% |
| Currently Married | 29.1% | 16.0% | 48.0% |
| Married but Separated | 3.8% | 0.0% | 1.8% |
| Single Population | 67.2% | 84.0% | 50.2% |
| Never Married | 42.2% | 68.3% | 33.8% |
| Divorced | 15.5% | 9.6% | 10.8% |
| Widowed | 9.4% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 2.95 | 5.01 | 2.60 |
| Households | 399 | 279 | 124,010,992 |
| Family Households | 240 | 215 | 80,755,759 |
| Married couple, w/children | 10.4% | 19.1% | 30.5% |
| Married couple, no children | 35.0% | 0.0% | 42.9% |
| Non Family Households | 159 | 64 | 43,255,233 |
| Single householder, w/children | 49.6% | 64.7% | 15.8% |
| Single householder, no children | 5.0% | 16.3% | 10.8% |