Big Lake (Dena'ina: K'enaka Bena[2])is a census-designated place (CDP) in Matanuska-Susitna Borough, Alaska, United States.

Big Lake, Alaska experiences an average of 51.4 inches of snowfall per year, 109 precipitation days, 131 sunny days,[5] and an average annual wind speed of 8.18 MPH.

Big Lake North State Recreation Site is a 19 acres (7.7 ha) park with a large campground, picnic areas, boat launch, and jetski rentals.

[9] Winter activities in both parks include cross country skiing, ice fishing, and dog mushing.

24.1% of all households were made up of individuals, and 4.2% had someone living alone who was 65 years of age or older.

Within Big Lake is the former short-lived incorporated city of Long Island, which existed from 1965–1975 and had just 7 residents on the 1970 census.

[18][19] It was located on the northeast side of Big Lake at 61°32′35″N 149°52′45″W / 61.54306°N 149.87917°W / 61.54306; -149.87917 (Long Island, Alaska).