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.

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.

[2] In 2010, NC 138's northern terminus was truncated further south along a new routing of US 52.