South Dakota (SD)
Eligibility
Age: 18 (may register at 17 if turning 18 by election day)
ID Requirements
To Register: SD driver's license or non-driver ID number; if no DL, last 4 of SSN. If neither, applicant must provide a personal identification affidavit facilitated by the registration examiner.
To Vote: Photo ID required (free voter ID available)
Registration Methods
- Online: This state does not offer online voter registration. Residents must register by mail or in person.
- Mail: Residents can register to vote by completing a paper registration form and submitting it by mail to the appropriate election office.
- In Person: Residents can register to vote by visiting a designated government office, such as a county clerk's office or DMV, and completing a registration form on site.
Early Voting
A period before Election Day during which voters can cast their ballots in person at designated polling locations. The length of the early voting period varies by state.
In-person absentee voting available at county auditor offices 46 days before election.
Mail-In / Absentee Voting
A voting method where ballots are automatically mailed to all registered voters without requiring a specific request. States that use this approach conduct elections primarily or entirely by mail.
No-excuse absentee voting by mail available for all registered voters.
Felony Voting Rules
State laws governing whether and when people with felony convictions can vote. Policies range from no restrictions to permanent disenfranchisement, with most states restoring rights at some point after sentencing.
Rights restored upon completion of sentence (incarceration). People on parole or probation for a felony may not vote.
Documentation Needed
- Valid photo ID or signed affidavit
Recent News
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Legislature Sends 60% Threshold Amendment to 2026 Ballot
South Dakota voters will be asked in November 2026 whether to increase the approval threshold for constitutional amendments from a simple majority to 60 percent.
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New Campaign Finance Reporting Requirements Effective July 2025
A new law effective July 1, 2025 requires candidates running for legislative or county office to file a pre-primary campaign finance report.
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Legislature Approves Several New Restrictions on Citizen Ballot Measures
South Dakota legislature passed restrictions on citizen ballot initiatives, including shortening petition collection periods and requiring signatures from specific geographic areas.
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South Dakota Voters to Decide on Citizenship Voting Requirement Amendment in 2026
A constitutional amendment will appear on the 2026 ballot to explicitly state that only U.S. citizens may vote in South Dakota elections.
Sources
Pending Legislation
- SB 175 (2026) Would require documentary proof of citizenship for voter registration Passed Senate 28-6 on Feb 20, 2026; pending House action
Last verified: Feb 24, 2026
Change Log
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Recent NewsAdded recent news items