| Official Name: | Black Oak, Arkansas |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Arkansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Washington |
| Subdivision Type3: | Township |
| Subdivision Name3: | White River |
| Population Footnotes: | [1] |
| Population Total: | 209 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1286 |
| Elevation M: | 392 |
| Pushpin Map: | Arkansas#USA |
| Pushpin Map Caption: | Black Oak's position in Arkansas. |
| Coordinates: | 35.9833°N -94.0797°W |
| Area Code: | 479 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 56931 |
Black Oak is a community in White River Township, Washington County, Arkansas, United States.[2] It is located between Greenland and Elkins and lies six miles southeast of Fayetteville.[3]
The community lies along the west bank of the Middle Fork of the White River. The community of Sulphur City lies on the east bank of the river approximately 1.5 miles to the southeast.[4]