| | Guymon, OK | Goodland, KS | United States |
| Population | 12,804 | 3,764 | 329,725,481 |
| Female Population | 43.9% | 47.8% | 50.5% |
| Male Population | 56.1% | 52.2% | 49.5% |
| Median Age | 30.5 | 39 | 38.4 |
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| Population - 2010 | 11,538 | 4,492 | 309,327,143 |
| Population - 2000 | 10,472 | 4,948 | 285,036,114 |
| Population - 1990 | 7,803 | 4,983 | 251,960,433 |
| Pop. 2000 to Now | 5.1% | -13.1% | 15.6% |
| Pop. 1990 to Now | 41.1% | -13.7% | 30.8% |
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| Population Density | 1,646.4 | 841.3 | 93.4 |
| Land Area | 7.8 | 4.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Guymon, OK | Goodland, KS | United States |
| Age 0 to 4 | 8.4% | 6.7% | 5.9% |
| Age 5 to 9 | 7.7% | 2.8% | 6.1% |
| Age 10 to 14 | 9.7% | 8.4% | 6.6% |
| Age 15 to 17 | 4.6% | 5.8% | 3.9% |
| Age 18 to 20 | 3.9% | 5.6% | 4.0% |
| Age 21 to 24 | 6.0% | 6.3% | 5.2% |
| Age 25 to 34 | 16.1% | 6.2% | 13.8% |
| Age 35 to 44 | 11.5% | 15.6% | 12.9% |
| Age 45 to 54 | 13.4% | 9.7% | 12.6% |
| Age 55 to 59 | 7.7% | 7.4% | 6.7% |
| Age 60 to 64 | 3.8% | 8.3% | 6.3% |
| Age 65 to 74 | 5.3% | 6.6% | 9.6% |
| Age 75 to 84 | 1.3% | 6.0% | 4.5% |
| Age 85 and over | 0.6% | 4.6% | 1.9% |
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| Race | | | |
| | Guymon, OK | Goodland, KS | United States |
| White | 28.6% | 78.9% | 59.4% |
| Black | 7.2% | 0.4% | 12.2% |
| Asian | 4.6% | 0.0% | 5.6% |
| Native American | 0.6% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.0% | 3.8% | 3.2% |
| Hispanic | 57.0% | 16.9% | 18.4% |
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| Marriage & Family | | | |
| | Guymon, OK | Goodland, KS | United States |
| Married Population | 43.2% | 40.3% | 49.8% |
| Currently Married | 39.9% | 37.3% | 48.0% |
| Married but Separated | 3.2% | 2.9% | 1.8% |
| Single Population | 56.8% | 59.7% | 50.2% |
| Never Married | 39.3% | 36.0% | 33.8% |
| Divorced | 14.1% | 14.8% | 10.8% |
| Widowed | 3.5% | 8.9% | 5.6% |
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| Household Size | 3.13 | 2.28 | 2.60 |
| Households | 4,046 | 1,576 | 124,010,992 |
| Family Households | 2,331 | 956 | 80,755,759 |
| Married couple, w/children | 34.5% | 16.0% | 30.5% |
| Married couple, no children | 33.9% | 44.5% | 42.9% |
| Non Family Households | 1,715 | 620 | 43,255,233 |
| Single householder, w/children | 26.5% | 36.6% | 15.8% |
| Single householder, no children | 5.1% | 2.9% | 10.8% |