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South Dakota County
Yankton County, South Dakota
Yankton - South Dakota's first territorial capital and Lewis and Clark's Missouri River - from Yankton's territorial capital heritage (Yankton served as the capital of Dakota Territory from 1861-1883 - the territorial government that preceded both North and South Dakota's statehood was administered from Yankton, making it one of the most historically significant communities in the northern Great Plains) to the Missouri National Recreational River (the free-flowing stretch of the Missouri River between Yankton and Niobrara, Nebraska - one of the last unchannelized segments of the Missouri - is designated a National Scenic Riverway protecting the natural river habitat that Lewis and Clark traveled in 1804) and Mount Marty University.
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Services: Oversees the Yankton County Skywarn severe weather spotting team, Yankton County Search and Rescue, and the Yankton County CERT (Community Emergency Response Team).
Related: City of Yankton 911 Communications Center – 24/7/365 Public Safety Answering Point (PSAP) dispatching for Yankton Police, Yankton County Sheriff’s Office, Yankton County Ambulance, Yankton Fire Department, and more; handled over 20,000 calls for service in 2024.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: US-81 crosses the Missouri River at Yankton, the county seat, in southeastern South Dakota near the Nebraska border, via the Meridian Bridge
Transit: Limited; primarily auto-dependent – confirm current regional options directly with the county.
Business & Permits
BUILDING & PERMITS
Office: City of Yankton Building Services & Permits – 416 Walnut Street, PO Box 176, Yankton, SD 57078, Building Official Gregg Homstad, (605) 668-5253
Services: Building permits under the 2021 International Building Code and related adopted codes.
Notes: Yankton County has its own separate building permit application for unincorporated areas.
Veterans Services
VETERANS SERVICES
County VSO: Yankton County Veterans Service Officer – Yankton County Courthouse, Yankton, SD
Services: Public computers, WiFi, printer, copier, fax, ebooks/eaudiobooks via Libby, children’s dramatic play station.
Related: The historic Yankton Carnegie Library (built 1902-03, NRHP-listed 1979) served as the town’s public library from 1903 to 1973 before later becoming the Lewis and Clark Mental Health Center.
Parks & Recreation
PARKS & RECREATION
Key Assets: Yankton County is genuinely and famously home to the FIRST CAPITAL OF DAKOTA TERRITORY, a distinction that shaped the town’s identity for generations; when President Abraham Lincoln formally organized the vast Dakota Territory in March 1861 – spanning from Minnesota’s western border all the way to the Rocky Mountains – he appointed his friend William Jayne as territorial governor, and Jayne selected Yankton as the capital specifically for its strategic location on the Missouri River, then the primary travel route into the region; the Dakota Territorial Assembly convened in Yankton continuously from 1862 until 1883, meeting in a modest two-story wood-frame capitol building – a genuinely lively seat of government that saw more than its share of drama, including one territorial House speaker who was famously thrown out of a saloon window by his political opponents after they’d first failed to eject him from the legislative chamber itself; the original capitol building was ultimately razed in 1886, but a faithful replica now stands in Yankton’s Riverside Park, housing photos of old Yankton, a gallery of former territorial governors, and other historical displays; in 1883, amid considerable political controversy – reportedly including officials secretly boarding a predawn train car in Yankton simply to establish a legal quorum for the move – the territorial capital was relocated to Bismarck, and Yankton was later passed over again for the state capital in 1889, losing that bid to Pierre; despite these disappointments, Yankton genuinely holds numerous other “firsts” in Dakota Territory history: it was home to the territory’s first newspaper (the Yankton Press & Dakotan, founded in 1861, which later became the oldest daily newspaper in South Dakota), the first high school in the Dakotas (1875), and the first college in Dakota Territory; the town also has a genuine historical connection to the Wild West – after Wild Bill Hickok was killed in Deadwood in 1876, his accused murderer Jack McCall stood trial in the territorial capital of Yankton and was convicted and hanged there on March 1, 1877
Notes: Yankton’s genuine, extensively documented status as the first capital of Dakota Territory – complete with a saloon-window political drama and a replica capitol building – is one of the richest and most colorful territorial histories found anywhere in this project.
GIS & Maps
GIS & MAPS
GIS Portal: Yankton County GIS – accessible via co.yankton.sd.us
Parcel Search: Yankton County Register of Deeds – Yankton, SD
Addressing/911: Coordinated through Yankton County Emergency Management
Animal Services
ANIMAL SERVICES
Facility: Heartland Humane Society – 3400 East Highway 50, Yankton, SD 57078 | (605) 664-4244
Services: Limited-admissions shelter (intake by appointment) serving Yankton and Clay counties, with an additional twelve-county service area; established 2006 from the former Yankton Area Humane Society; expanded facility in 2014 and again in 2017, now capable of serving up to 850 animals annually; adoptions by appointment, though walk-ins welcome.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Environmental Complaints: South Dakota Department of Agriculture and Natural Resources (DANR) – danr.sd.gov
Notes: Contact your specific municipality directly for current refuse collection and recycling program details. Yankton is historically known as the “Fountain City” for its artesian well development.
NOTES
Yankton County’s seat, Yankton, is genuinely the first capital of Dakota Territory (1861-1883), with a replica of the original capitol building preserved today in Riverside Park. All contact information above was sourced from official county, city, library, and shelter pages as of this writing; phone numbers and hours should be reconfirmed directly with the relevant office before a visit.
About Yankton County
Yankton County is South Dakota’s first territorial capital – Yankton governed the vast Dakota Territory from 1861-1883, and the Missouri National Recreational River’s free-flowing stretch preserves the natural waterway Lewis and Clark traveled in 1804.
Yankton (the county seat, population ~15,000) is the Missouri River’s southeast South Dakota hub – the free-flowing river, the territorial heritage, and Mount Marty University anchor a community with deep historical roots.
All Services
Browse every category and topic available for this county.
Yankton County Director of Equalization at 321 W. 3rd Street, Suite 3, Yankton, SD 57078, phone 605-260-4400. SD residential owner-occupied exemptions apply.
Courts & Legal
Yankton County Circuit Court at 321 W. 3rd Street, Yankton, SD 57078, phone 605-260-4500, handles probate.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
CLERK OF COURTS
410 Walnut St, Yankton, SD 57078
(605) 668-3438
Genealogy
County-level record sources
Yankton County Clerk of Courts, Yankton (probate/estate case files – see Probate section above).
Yankton served as the first capital of Dakota Territory (1861-1883), making it a significant historical and genealogical research site in its own right.
Local societies
No dedicated Yankton County genealogical society was confirmed in available directories.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Where to go
Clerk of Courts, Yankton County 410 Walnut Street, Suite 205, Yankton, SD 57078 (605) 668-3080
Yankton County is in southeastern South Dakota along the Missouri River, seated in Yankton – the first capital of Dakota Territory (1861-1883) before the capital moved to Bismarck.
Step 1: figure out which path applies
South Dakota HAS adopted the Uniform Probate Code (Articles I, II, III, IV, and VIII, effective July 1, 1995). Probate proceedings are handled by the Circuit Court in the county where the decedent lived, generally administered under the supervision of the Clerk of Courts.
Small Estate Affidavit – Collection of Personal Property (SDCL § 29A-3-1201) – available when the total gross value of the entire estate, wherever located, less liens and encumbrances, does not exceed $50,000. At least 30 days must have passed since death, no petition for appointment of a personal representative is pending or has been granted anywhere, and the decedent had no outstanding debts to the Department of Social Services for medical assistance or institutional/nursing home care. A separate affidavit exists for South Dakota real estate under $50,000, which must also be filed with the Register of Deeds where the property sits.
Informal Probate – the most common track in South Dakota, used when heirs and beneficiaries are getting along and no disputes are expected.
Unsupervised Formal Probate and Supervised Formal Probate – for more complex or contested situations.
Step 2: filing for administration
The personal representative (or an interested party) files an application or petition with the Clerk of Courts in Yankton County, along with the original will if one exists.
For informal probate, the clerk reviews the application administratively and issues Letters Testamentary or Letters of Administration without a hearing in most cases.
Formal proceedings require notice to interested parties and, if contested, a hearing before the circuit judge.
The personal representative gathers and inventories assets, notifies creditors, and pays valid debts and expenses.
After debts and taxes are satisfied, remaining assets are distributed according to the will or South Dakota’s intestacy statutes (SDCL Chapter 29A-2).
The estate is formally closed by filing a sworn closing statement or a petition for formal order of discharge (SDCL § 29A-3-1003).
What it costs
Court costs are set by law and paid to the Clerk of Courts; confirm current fees with Yankton County directly.
South Dakota has NO state estate tax and NO state inheritance tax. Only the federal estate tax may apply, and only to very large estates.
A surviving spouse cannot be disinherited in South Dakota unless the spouse agrees.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
410 Walnut St, Yankton, SD 57078
(605) 665-4444
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
AUDITOR (ELECTIONS)
410 Walnut St, Yankton, SD 57078
(605) 668-3438
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Public Health
410 Walnut St, Yankton, SD 57078
(605) 668-3438
Social Services
410 Walnut St, Yankton, SD 57078
(605) 668-3438
Public Health Information
PUBLIC HEALTH
Office: Yankton County Public Health Nursing Service – Yankton, SD
Services: Immunizations, WIC, environmental health, vital records.
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Last verified June 2026
County Facts
County Seat: Yankton
Population: 23,000
Established: 1862
Tier: 3
Public Records
TruthFinder
Search public records for Yankton County residents.
