| Blackrock Mountain | on the Jackson-Macon county line between Hamburg Gap and Buck Gap. |
| Blackrock Mountain | N Jackson County on the N end of Blackrock Ridge on Plott Balsams. Alt. 6,100. |
| Blackrock Mountain | on the Jackson-Macon county line between Granite City formations and Wildcat Gap. |
| Blackrock Ridge | N Jackson County, extends N from Scott Creek to Soco Creek. |
| Blacksnake Branch | rises in N Transylvania County and flows SE into Turkey Creek. |
| Blackstock Branch | rises in N Buncombe County and flows NW into Madison County, where it enters Ivy River. |
| Blackstock Knob | on the Buncombe-Yancey county line between Balsam and Rainbow Gaps. Alt. 6,325. Probably named for a surveyor, Nehemiah Blackstock, who worked in the vicinity in 1845. |
| Blackstone | community in NE Caldwell County. Named for Sir William Blackstone (1723-80), English jurist, by Col. George N. Folk, who conducted a law school there after the Civil War. |
| Blackwalnut Swamp | rises in E Bertie County and flows E into Chowan River. |
| Blackwater River | rises in Virginia and flows SW into North Carolina, where it joins the Nottoway River a short distance S of the Virginia line on the Hertford-Gates county line to form the Chowan River. The name appears on the Comberford map, 1657. |