Route 550 is a 14-mile-long (23 km) road stretching from Route 50 in Waimea to Kōkeʻe State Park on the island of Kauai.

Leaving Waimea, Hawaii Route 550 increases in elevation to over two thousand feet, at times the road is winding and steep.

For much of its length, Hawaii Route 550 is adjacent to Waimea Canyon.

The entire route is in Kauai County.

This Hawaii road or road transport-related article is a stub.