Method and apparatus are disclosed for interlocking wire conduits for vehicles. An example vehicle includes wiring and conduits. The conduits include a first conduit and a second conduit that each include an inner surface defining a pathway for the wiring, an outer surface, annular ribs extending from the outer surface and defining annular grooves, flanges protruding from distal ends of the annular ribs and configured to interlock with the flanges of the other of the conduits.