Interstate 840 (North Carolina)

Interstate 840
I-840 highlighted in red
Route information
Auxiliary route of I-40
Maintained by NCDOT
Length	21.9 mi[1] (35.2 km)
Existed	2011 (2011)[2]–present
History	First segment opened in 2002 officially designated as SR 3269; officially designated as I-840 in 2011
NHS	Entire route
Major junctions
West end	I-40 / I-73 / US 421 in Greensboro
Major intersections	I-73 near Oak Ridge US 220 in Greensboro I-785 / US 29 in Greensboro US 70 in Greensboro
East end	I-40 / I-85 / I-785 in Greensboro
Location
Country	United States
State	North Carolina
Counties	Guilford
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future North Carolina Highway System Interstate US State Scenic
← NC 801 → I-885

Interstate 840 (I-840) is a 21.9-mile (35.2 km) auxiliary Interstate Highway and state highway in the U.S. state of North Carolina. It is the northern half of the Greensboro Urban Loop beltway around the city of Greensboro. It connects I-40, I-73, and US 421 in the west with I-40, I-85, and I-785 in the east. It was completed on January 23, 2023.

I-840 runs concurrently with I-73 from its western terminus to its interchange with Bryan Boulevard in the northwest and I-785 from its interchange with US 29 (North O'Henry Boulevard) in the northeast to its eastern terminus. The route provides a continuous freeway bypass around Greensboro's west, north, and east sides.