As of July 25, 2020, per the Governor's Executive Order 20-81, people in Minnesota over the age of 5 are required to wear a face covering in all public indoor spaces and businesses, unless alone.

Children under age 2 years must not wear face coverings. Children between the ages of 2 and 5 years old are not required to wear face coverings, but are encouraged to wear a face covering when in public  if they can do so reliably in compliance with CDC guidance on How to Wear Cloth Face Coverings (i.e., without frequently touching or removing the face covering). This taken verbatum from the website https://www.health.state.mn.us/diseases/coronavirus/facecover.html