| | Breckenridge, TX | Mounds, OK | United States |
| Population | 5,258 | 1,039 | 329,725,481 |
| Female Population | 47.5% | 49.7% | 50.5% |
| Male Population | 52.5% | 50.3% | 49.5% |
| Median Age | 35.5 | 33.5 | 38.4 |
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| Population - 2010 | 5,763 | 1,157 | 309,327,143 |
| Population - 2000 | 5,868 | 1,153 | 285,036,114 |
| Population - 1990 | 5,665 | 980 | 251,960,433 |
| Pop. 2000 to Now | -8.0% | 7.9% | 15.6% |
| Pop. 1990 to Now | -4.7% | 26.9% | 30.8% |
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| Population Density | 1,252.8 | 479.2 | 93.4 |
| Land Area | 4.2 | 2.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Breckenridge, TX | Mounds, OK | United States |
| Age 0 to 4 | 6.8% | 8.7% | 5.9% |
| Age 5 to 9 | 8.5% | 5.6% | 6.1% |
| Age 10 to 14 | 9.3% | 7.5% | 6.6% |
| Age 15 to 17 | 3.4% | 3.7% | 3.9% |
| Age 18 to 20 | 2.6% | 4.5% | 4.0% |
| Age 21 to 24 | 6.0% | 6.5% | 5.2% |
| Age 25 to 34 | 13.1% | 13.7% | 13.8% |
| Age 35 to 44 | 14.4% | 13.4% | 12.9% |
| Age 45 to 54 | 10.1% | 9.5% | 12.6% |
| Age 55 to 59 | 5.8% | 9.2% | 6.7% |
| Age 60 to 64 | 6.9% | 5.0% | 6.3% |
| Age 65 to 74 | 6.6% | 8.0% | 9.6% |
| Age 75 to 84 | 3.9% | 4.4% | 4.5% |
| Age 85 and over | 2.6% | 0.3% | 1.9% |
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| Race | | | |
| | Breckenridge, TX | Mounds, OK | United States |
| White | 55.8% | 76.4% | 59.4% |
| Black | 4.7% | 1.3% | 12.2% |
| Asian | 1.6% | 0.3% | 5.6% |
| Native American | 0.0% | 13.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.4% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 2.0% | 7.5% | 3.2% |
| Hispanic | 35.7% | 0.3% | 18.4% |
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| Marriage & Family | | | |
| | Breckenridge, TX | Mounds, OK | United States |
| Married Population | 50.1% | 46.6% | 49.8% |
| Currently Married | 44.2% | 45.5% | 48.0% |
| Married but Separated | 5.9% | 1.1% | 1.8% |
| Single Population | 49.9% | 53.4% | 50.2% |
| Never Married | 28.4% | 28.7% | 33.8% |
| Divorced | 9.7% | 20.0% | 10.8% |
| Widowed | 11.8% | 4.7% | 5.6% |
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| Household Size | 2.64 | 2.66 | 2.60 |
| Households | 1,963 | 390 | 124,010,992 |
| Family Households | 1,288 | 264 | 80,755,759 |
| Married couple, w/children | 30.0% | 31.1% | 30.5% |
| Married couple, no children | 34.3% | 32.6% | 42.9% |
| Non Family Households | 675 | 126 | 43,255,233 |
| Single householder, w/children | 26.8% | 23.9% | 15.8% |
| Single householder, no children | 8.9% | 12.5% | 10.8% |