- Located at eastern intersection AR 18 and AR 135 northeast of Lake City
- Latitude: 35°50'20" N (+35.8389)
- Longitude: 90°22'05" W (-90.3681)
- Elevation: 233 feet above sea level
- Civil township: Black Oak
- Land area: 0.45 square miles (285.4 acres)
As the crow flies, Black Oak is...
| Year | Population | Percent change |
|---|
| 1930 | 302 | -- |
| 1940 | 329 | +8.9% |
| 1950 | 261 | -20.7% |
| 1960 | 220 | -15.7% |
| 1970 | 272 | +23.6% |
| 1980 | 309 | +13.6% |
| 1990 | 277 | -10.4% |
| 2000 | 286 | +3.2% |