S.D. Codified Laws § 19-19-506
Current with legislation signed by the governor on or before 3/6/2024
Every person has a privilege to refuse to disclose the tenor of his vote at a public election conducted by secret ballot. This privilege does not apply if the court finds that the vote was cast illegally or determines that the disclosure should be compelled pursuant to the election laws of the state.
SDCL 19-19-506