| | Piedmont, OK | Olive Branch, MS | United States |
| Population | 7,306 | 39,136 | 329,725,481 |
| Female Population | 50.5% | 52.4% | 50.5% |
| Male Population | 49.5% | 47.6% | 49.5% |
| Median Age | 36.1 | 38.4 | 38.4 |
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| Population - 2010 | 5,785 | 33,599 | 309,327,143 |
| Population - 2000 | 3,650 | 21,054 | 285,036,114 |
| Population - 1990 | 2,522 | 3,567 | 251,960,433 |
| Pop. 2000 to Now | 146.1% | 88.3% | 15.6% |
| Pop. 1990 to Now | 256.1% | 1,011.5% | 30.8% |
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| Population Density | 167.6 | 1,051.9 | 93.4 |
| Land Area | 43.6 | 37.2 | 3,531,905.4 |
| Water Area | 0.4 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Piedmont, OK | Olive Branch, MS | United States |
| Age 0 to 4 | 9.5% | 5.7% | 5.9% |
| Age 5 to 9 | 7.7% | 7.0% | 6.1% |
| Age 10 to 14 | 6.6% | 7.2% | 6.6% |
| Age 15 to 17 | 5.2% | 4.4% | 3.9% |
| Age 18 to 20 | 2.3% | 3.8% | 4.0% |
| Age 21 to 24 | 1.2% | 4.3% | 5.2% |
| Age 25 to 34 | 13.9% | 12.7% | 13.8% |
| Age 35 to 44 | 14.6% | 13.9% | 12.9% |
| Age 45 to 54 | 10.5% | 14.2% | 12.6% |
| Age 55 to 59 | 7.0% | 6.7% | 6.7% |
| Age 60 to 64 | 6.6% | 5.8% | 6.3% |
| Age 65 to 74 | 8.5% | 8.2% | 9.6% |
| Age 75 to 84 | 4.3% | 4.2% | 4.5% |
| Age 85 and over | 2.1% | 1.8% | 1.9% |
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| Race | | | |
| | Piedmont, OK | Olive Branch, MS | United States |
| White | 75.2% | 56.2% | 59.4% |
| Black | 3.3% | 32.3% | 12.2% |
| Asian | 4.1% | 2.2% | 5.6% |
| Native American | 2.4% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 7.4% | 3.7% | 3.2% |
| Hispanic | 7.6% | 5.6% | 18.4% |
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| Marriage & Family | | | |
| | Piedmont, OK | Olive Branch, MS | United States |
| Married Population | 76.8% | 53.9% | 49.8% |
| Currently Married | 75.1% | 51.9% | 48.0% |
| Married but Separated | 1.7% | 2.0% | 1.8% |
| Single Population | 23.2% | 46.1% | 50.2% |
| Never Married | 12.9% | 27.6% | 33.8% |
| Divorced | 6.5% | 12.9% | 10.8% |
| Widowed | 3.7% | 5.7% | 5.6% |
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| Household Size | 2.76 | 2.65 | 2.60 |
| Households | 2,645 | 14,751 | 124,010,992 |
| Family Households | 2,172 | 10,477 | 80,755,759 |
| Married couple, w/children | 40.9% | 30.1% | 30.5% |
| Married couple, no children | 50.3% | 44.0% | 42.9% |
| Non Family Households | 473 | 4,274 | 43,255,233 |
| Single householder, w/children | 5.6% | 16.6% | 15.8% |
| Single householder, no children | 3.1% | 9.3% | 10.8% |