| State: | NC |
| Type: | NC |
| Route: | 138 |
| Map: | NC 138 map.svg |
| Established: | 1973 |
| Length Mi: | 13.6 |
| Length Round: | 1 |
| Direction A: | South |
| Terminus A: | in Oakboro |
| Direction B: | North |
| Terminus B: | near Albemarle |
| Previous Type: | NC |
| Previous Route: | 137 |
| Next Type: | I |
| Next Route: | 140 |
North Carolina Highway 138 (NC 138) is a primary state highway in the U.S. state of North Carolina. It serves to connect the community of Aquadale to nearby Oakboro and Albemarle.
NC 138 is a two-lane rural highway that begins immediately after NC 742 begins in downtown Oakboro. Going east, it crosses over Long Creek, a tributary of the Rocky River, then proceeds northeast to Aquadale. After crossing a railroad track in Aquadale it goes north to end at U.S. Route 52 (US 52) just south of Albemarle.
NC 138 was established in 1973 as a new primary routing from NC 742 in Oakboro, through Aquadale, to US 52/NC 24/NC 27/NC 73 in Albemarle.[1] In 2010, NC 138's northern terminus was truncated further south along a new routing of US 52.[2]