S.D. Codified Laws § 11-5-8
Any homeowner, regardless of any private covenants, restrictions, bylaws, rules, or requirements, may erect a freestanding flagpole no more than twenty feet high on any portion of the homeowner's property, if the flagpole does not obstruct sightlines at intersections and is not erected within or upon an easement. The homeowner may further display from that flagpole, one official United States flag, not larger than four and one-half feet by six feet, and may additionally display one official South Dakota State flag or official flag that represents the United States Army, Navy, Air Force, Marine Corps, Space Force, or Coast Guard, or a POW MIA flag. The additional flag must be equal in size to or smaller than the official United States flag.
The flagpole specifications and display are subject to building codes imposed by this state or appropriate local governing body.
SDCL 11-5-8