Willernie is a city in Washington County, Minnesota, United States.

As of the census[7] of 2010, there were 507 people, 218 households, and 123 families living in the city.

There were 240 housing units at an average density of 2,000.0 per square mile (772.2/km2).

33.5% of all households were made up of individuals, and 12.8% had someone living alone who was 65 years of age or older.

There were 229 housing units at an average density of 1,787.5 per square mile (690.2/km2).

27.6% of all households were made up of individuals, and 6.7% had someone living alone who was 65 years of age or older.