Chignik Lagoon (Alutiiq: Nanwarnaq) is a census-designated place (CDP) in Lake and Peninsula Borough, Alaska, United States.

According to the United States Census Bureau, the CDP has an area of 13.8 square miles (35.7 km2), all of it land.

[6] In 2009 the Marines of 4th Combat Engineer Battalion, 4th Marine Division, began work on an inter-village road system to link Chignik Lake to Chignik Lagoon.

24.2% of all households were made up of individuals, and 3.0% had someone living alone who was 65 years of age or older.

There were no families and 1.8% of the population living below the poverty line, including no under eighteens and none of those over 64.