S.D. Codified Laws § 32-15-8 (2026)
Every motor vehicle entitled to be licensed in South Dakota shall be equipped with a mirror so located as to reflect to the driver a view of the highway for a distance of at least two hundred feet to the rear of such vehicle, whether operated singly or towing another vehicle. A violation of this section is a petty offense.
Source: SDC 1939, § 44.0348; SL 1967, ch 198 ; SL 1989, ch 255 , § 36.