S.D. Codified Laws § 9-13-37
Any other provision of this chapter notwithstanding, the members of the governing body of a municipality may choose to hold a municipal election in conjunction with the regular June primary election. The combined election is subject to approval by the county commissions of the counties in which the municipality is located. Expenses of a combined election shall be shared in a manner agreed upon by the governing body of the municipality and the county commissions involved. All other governmental responsibilities associated with holding elections under the provisions of chapters 9-13 and Title 12 shall be shared as agreed upon by the governing bodies. The finance officer shall publish the notice required in § 9-13-6 between February fifteenth and March first. No nominating petition may be circulated for signatures until March first. Nominating petitions shall be filed under the provisions of § 9-13-7 by the last Tuesday in March. The finance officer shall certify to the appropriate county auditor the candidate names and ballot language to be voted on by the first Thursday after the last Tuesday in March.
SDCL 9-13-37