Kalihi is a neighborhood of Honolulu on the island of Oʻahu in Hawaiʻi, United States. Split by the Likelike Highway (Route 63), it is flanked by downtown Honolulu to the east and , Moanalua and Salt Lake to the west. Kalihi Valley has been carved by Kalihi Stream; it is narrow and steep in its upper reaches (with source around 21°22′29″N 157°48′55″W / 21.37472°N 157.81528°W, but widens out to flatlands as it approaches Honolulu Harbor, with its mouth at 21°19′51″N 157°53′26″W / 21.33083°N 157.89056°W.