Ka Loko Reservoir is a reservoir created by an earthen dam on the island of Kauai, Hawaii. It is located on the north side of the island at 22°10′39″N 159°22′39″W / 22.17750°N 159.37750°W. Waters flow from Ka Loko Reservoir down to Waiakalua Reservoir, Waiakalua Stream and down to the Pacific Ocean.