The short version.
South Dakota is a petition state — there is no candidate filing fee. To get on the ballot you circulate a nominating petition: as a party candidate for the June primary (signed by voters registered with your party), or as an independent heading straight to the November ballot (any registered voter may sign). County candidates file their petitions with the Buffalo County Auditor; legislative, statewide, and federal candidates file with the Secretary of State.
This page covers how that works for Buffalo County. It is not legal advice — your County Auditor and the Secretary of State's county candidate guide are the sources of truth.
Buffalo County at the ballot box.
- In 2024, Buffalo County cast 466 votes for president: 62.4% Democratic, 35.2% Republican.
- In 2020, it was 64.1% Democratic to 33.3% Republican across 549 votes.
Election results are public county canvasses. Statewide coverage details: Motion51 in South Dakota.
The petition route (party candidates).
Every South Dakota party candidate qualifies the same way: a nominating petition, circulated between January 1 and the last Tuesday of March of the election year, then filed by 5:00 p.m. that day (SDCL 12-6-4.1, 12-6-4).
- Legislature and county offices: signatures from 1% of the voters who voted for your party's candidate for Governor at the last gubernatorial election in the county or district — or 50 voters, whichever is less (SDCL 12-6-7). In most counties that means a small, very achievable number.
- Statewide offices (Governor, U.S. Senate, U.S. House): 1% of your party's gubernatorial vote statewide.
- Who can sign: only voters registered with your party in the area the office serves.
- Where to file: county offices → the Buffalo County Auditor; legislative, statewide, and federal offices → the Secretary of State.
Signatures get checked, so collect a comfortable cushion. Candidates who petition well treat it as the first week of the field program: every signer is a confirmed registered voter of your party, and every gatherer is a future volunteer.
Counties that vote at vote centers use slightly different counts (a flat 50 for legislative candidates, half-counts for commissioner districts), and sheriff candidates also file a law-enforcement certification (SDCL 23-3-43.1). Judicial and municipal offices run on separate processes. Your County Auditor will confirm the exact number for your race.
Running as an independent.
Independents skip the June primary and petition straight onto the November ballot (SDCL 12-7-1): signatures from 1% of the total vote for Governor at the last gubernatorial election in the county or district, and any registered voter may sign. The independent deadline is later — the last Tuesday of April at 5:00 p.m. — but the circulation window still opens January 1.
Key South Dakota dates — the 2026 cycle.
- Jan 1, 2026Petition circulation opened for the 2026 cycle (party and independent candidates).
- Tue Mar 31, 2026Party-candidate petitions were due by 5:00 p.m. (county offices with the Auditor; state and federal with the Secretary of State).
- Tue Apr 28, 2026Independent-candidate petitions were due by 5:00 p.m.
- Tue Jun 2, 2026Primary election.
- Tue Nov 3, 2026General election.
The 2026 filing window has closed — these dates are shown so you can see the rhythm. The same calendar repeats for the next cycle: petitions for 2028 races can circulate starting January 1, 2028, with party filings due the last Tuesday of March. Current forms and deadlines: the Secretary of State's elections page. After you file, campaign-finance paperwork kicks in quickly (a financial interest statement is due within 15 days of filing).
Offices on the 2026 ballot.
Up in 2026 (primary June 2, general November 3):
- U.S. Senate and U.S. House
- Governor
- South Dakota Senate and House — the entire Legislature (all seats, every two years)
- County offices — commissioner, auditor, finance officer (where applicable), sheriff, register of deeds
Vacancies and appointments can put other Buffalo County seats on the ballot — confirm the local list with the County Auditor below.
Your County Auditor.
South Dakota runs county elections through its 66 County Auditors. The Buffalo County Auditor is where county candidates file petitions, and the source of truth for local dates, districts, signature counts, and forms.
- Office
- PO Box 146, Gann Valley, SD 57341
- Phone
- (605) 293-3217
Contact details verified 2026-07-03 against the Secretary of State's county auditor directory. If a field is wrong or out of date, the directory above is the canonical source.
After you qualify: building a field operation.
The petition is the paperwork — and in South Dakota it's also your first field test. What comes next is the actual campaign: knocking on doors, recruiting volunteers, and identifying the voters who'll show up for you in June and November.
That's what Motion51 is built for. The Buffalo County voter file is already loaded — no chasing a CSV or paying a vendor. You scope your district, recruit volunteers, cut turf, and start knocking. The app works offline for the stretches where cell coverage drops, and every door is logged with a timestamp.
If qualifying is settled and you're thinking about the field operation, our For Candidates page walks through the next steps.