Louisiana Highway 3151 (LA 3151) is a state highway in Louisiana that serves Jefferson Parish. It runs in a west to east direction spanning a total of 1.1 miles (1.8 km). It is known locally as Humble Road.
From the west, LA 3151 begins at an intersection with LA 1 in Grand Isle. It runs north of and parallel to LA 1 and ends at another junction with the same highway a little more than a mile away (very near its southern terminus).
LA 3151 is an undivided, two-lane road for its entire length.