| Big Junction | a mountain on the Graham County, N.C.-Monroe County, Tenn., line. |
| Big Juniper Creek | rises in W Moore County and flows NE into McLendons Creek. |
| Big Kennedy Creek | rises in S Yadkin County and flows S into Iredell County. It enters Flat Rock Creek NE of Houstonville. |
| Big Kinnakeet Coast Guard Station | SE Hatteras Island in Dare County. First est. as lifesaving station in 1878-79. Lifesaving Service and Revenue Cutter Service joined to form U.S. Coast Guard in 1915. Now decommissioned. |
| Big Kitchens Knob | SE Clay County at the NW end of Big Kitchens Ridge. |
| Big Kitchens Ridge | SE Clay County between Sassafras Branch and Holden Cove. |
| Big Knob | S Watauga County on the head of Buffalo Creek. |
| Big Knob | N Madison County on the NE end of Bearpen Ridge. |
| Big Knob | E Madison County on the head of Bear Branch. |
| Big Knob | on the N end of Big Ridge in S Jackson County. |