This guide is for general information only and is not legal advice. Laws change — verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
The rule
There is no statewide rule on sidewalk cycling — it is left to cities and counties in South Dakota. South Dakota's bicycle code (SDCL Ch. 32-20A) does not address sidewalk riding statewide; regulation is left to municipalities under their general traffic-ordinance authority in SDCL Ch. 9-30. Sioux Falls allows sidewalk riding except in the downtown business district; Rapid City permits it citywide subject to yielding to pedestrians.
What this means in practice
Because South Dakota doesn't set a statewide rule, the answer is "it depends on the city." Central business districts, downtown cores, and school zones are the most commonly restricted areas. Always check the local municipal code before you ride on a sidewalk.