S.D. Codified Laws § 1-27-42
The public record officer for the state is the secretary, constitutional officer, elected official, or commissioner of the department, office, or other division to which a request is directed. The public record officer for a county is the county auditor or the custodian of the record for law enforcement records. The public record officer for a first or second class municipality is the finance officer or the clerk or the custodian of the record for law enforcement records. The public record officer for a third class municipality is the president of the board of trustees or the custodian of the record for law enforcement records. The public record officer for an organized township is the township clerk. The public record officer for a school district is the district superintendent or CEO. The public record officer for a special district is the chairperson of the board of directors. The public record officer for any other entity not otherwise designated is the person who acts in the capacity of the chief financial officer or individual as designated by the entity.
SDCL 1-27-42