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is a census-designated place (CDP) in Kenai Peninsula Borough, Alaska, United States. At the 2000 census the population was 772.
Ninilchik is on the west side of the Kenai Peninsula on the Sterling Highway, 61 km (38 miles) southwest of the Kenai, and 100 air miles southwest of Anchorage.
According to the United States Census Bureau, the CDP has a total area of 207.6 square miles (537.7 km²), of which, 207.6 square miles (537.6 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.01%) is water.