It really depends, even from one city or town to another there's different laws. However in California electric-powered skateboards are allowed use of bike lane

It really depends, even from one city or town to another there's different laws. However in California electric-powered skateboards are allowed use of bike lanes (which are generally in the road). The sidewalks around here are either to crowded with pedestrians or in such bad shape as to make skateboarding virtually impossible (you might as well walk to your destination).