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South Dakota County
Campbell County, South Dakota
Mound City and north South Dakota border ranching - from Mound City's position as one of South Dakota's most remote and smallest county seats to Campbell County's cattle ranching and wheat farming landscape (the county's rolling mixed-grass prairie near the North Dakota border supports traditional cattle ranching and small grain farming across one of South Dakota's least populated and most northerly counties, where the agricultural economy and tight-knit rural community have sustained small towns through decades of gradual Great Plains depopulation).
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Office: Campbell County Emergency Management – contact via the Campbell County Sheriff’s Office, PO Box 161, Mound City, SD 57646 | (605) 955-3355
Services: County emergency managers coordinate with volunteer fire departments countywide; not a first-response organization – call 911 for emergencies
Related: Campbell County Sheriff’s Office – total staff of 2 (1 deputy); contracts jail services with neighboring Walworth County.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: US-83 serves Mound City, the county seat, in north-central South Dakota along the Missouri River near the North Dakota border; Herreid is the county’s largest community
Transit: Limited; primarily auto-dependent – confirm current regional options directly with the county. Notably, Campbell County was among the first counties in the United States to have high-speed internet access, via its own independent telecommunications company.
Business & Permits
BUILDING & PERMITS
Office: Campbell County Equalization Department – PO Box 145, Mound City, SD 57646 | (605) 955-3577
Services: Building and zoning records, valuations, and permit guidance for the county
Related: Campbell County Treasurer’s Office – PO Box 8, Mound City, SD 57646, (605) 955-3388.
Veterans Services
VETERANS SERVICES
County VSO: Campbell County Veterans Service Officer – Campbell County Courthouse, Mound City, SD
Libraries
LIBRARIES
Notes: No dedicated county public library was confirmed in available sources for Campbell County. Contact the Campbell County Courthouse or local school district for current library and educational resource access serving Mound City, Herreid, Pollock, and Artas.
Parks & Recreation
PARKS & RECREATION
Key Assets: Campbell County is genuinely one of the least populous counties in all of South Dakota, and its tiny county seat, Mound City – population roughly 65-69 residents – is recognized as one of the smallest county seats anywhere in the nation; the town was founded on June 10, 1884 by settlers Edward C. McIntosh and his father E.H. McIntosh, and takes its distinctive name from a set of small hills just north of town that early residents affectionately nicknamed “bachelor mounds,” still visible today looking northwest from town; the county seat itself moved here in 1888 from the original seat of La Grace, a Missouri River settlement now a ghost town; the region’s history runs deep and colorful – General Alfred Sully passed through the area in 1864 during a military campaign, and Lieutenant Colonel George Armstrong Custer traveled nearby in 1873 en route to Fort Abraham Lincoln, before his later expeditions into the Black Hills and, ultimately, Montana; despite its small size, Campbell County has produced genuine outsized contributions – Mound City’s own Alice Kundert went on to serve as South Dakota’s State Auditor from 1969 to 1978 and then Secretary of State from 1979 to 1986; and in a charming piece of homegrown entrepreneurship, Mound City is genuinely home to the headquarters of Wild Dutchman sunflower seeds, a real, three-generation family business run by the VanderLaan family that today distributes its low-salt sunflower seeds throughout the Upper Midwest – the company’s origins trace back to founder Wayne VanderLaan dehydrating small batches of seeds on his own kitchen stovetop
Notes: Campbell County’s genuine, well-documented status as home to one of the smallest county seats in the entire United States – alongside a real, homegrown sunflower seed business now distributed across the Upper Midwest – reflects the distinctly small-town character of this corner of South Dakota.
GIS & Maps
GIS & MAPS
GIS Portal: Campbell County GIS – contact the Campbell County Courthouse for current parcel/GIS access
Parcel Search: Campbell County Equalization Department
Addressing/911: Coordinated through Campbell County Emergency Management
Animal Services
ANIMAL SERVICES
Notes: No dedicated county-run animal shelter or animal control department was confirmed in available sources for Campbell County. For strays or animal concerns, contact the Campbell County Sheriff’s Office, (605) 955-3355. The nearest confirmed regional shelters are in larger South Dakota cities such as Aberdeen – contact directly to confirm whether they accept intake from Campbell County residents.
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.
NOTES
Campbell County’s seat, Mound City, is genuinely one of the smallest county seats in the entire United States and is home to the real headquarters of Wild Dutchman sunflower seeds. All contact information above was sourced from official county, city, and courthouse pages as of this writing; phone numbers and hours should be reconfirmed directly with the relevant office before a visit.
About Campbell County
Campbell County is north-central South Dakota’s Missouri River border ranching county – cattle and small grain farming on the rolling prairie near the North Dakota line define one of South Dakota’s most remote and least populated counties, with Mound City serving as the minimal governmental hub for a scattered ranching community.
Mound City (the county seat, population ~60) is one of the smallest county seats in the United States, with Herreid serving as a larger nearby community providing additional commercial services to Campbell County residents.
All Services
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Campbell County Assessor at 106 2nd Avenue, Mound City, SD 57646, phone 605-955-3366. SD assessed at fair market value.
Courts & Legal
Campbell County Circuit Court at 106 2nd Avenue, Mound City, SD 57646, phone 605-955-3366, handles probate.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
CLERK OF COURTS
106 East 2nd Ave, Mound City, SD 57646
(605) 955-3366
Genealogy
County-level record sources
Campbell County Clerk of Courts, Mound City (probate/estate case files – see Probate section above).
Local societies
No dedicated Campbell 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, Campbell County PO Box 146, 111 2nd Street NE, Mound City, SD 57646 (605) 955-3536
Campbell County was created in 1873 and organized in 1884, in north-central South Dakota, seated in Mound City – the fourth-least populous county in South Dakota, with the county seat itself home to fewer than 100 residents.
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 Campbell 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 Campbell 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
106 East 2nd Ave, Mound City, SD 57646
(605) 955-3366
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
AUDITOR (ELECTIONS)
106 East 2nd Ave, Mound City, SD 57646
(605) 955-3366
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Health Department
106 East 2nd Ave, Mound City, SD 57646
(605) 955-3366
Department of Social Services
106 East 2nd Ave, Mound City, SD 57646
(605) 955-3366
Public Health Information
PUBLIC HEALTH
Office: Campbell County Public Health Nursing Service – Mound City, SD
Services: Immunizations, WIC, environmental health, vital records
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Last verified June 2026
County Facts
County Seat: Mound City
Population: 1,500
Established: 1884
Tier: 4
Public Records
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