Lake St. Croix Beach or City of Lake Saint Croix Beach[2] is a city in Washington County, Minnesota, United States.

There were 502 housing units at an average density of 912.7 per square mile (352.4/km2).

31.7% of all households were made up of individuals, and 8.5% had someone living alone who was 65 years of age or older.

There were 487 housing units at an average density of 846.9 per square mile (327.0/km2).

25.5% of all households were made up of individuals, and 6.9% had someone living alone who was 65 years of age or older.