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Iowa County
Mahaska County, Iowa
Oskaloosa's William Penn University and the Iowa coal belt heritage - from William Penn University in Oskaloosa (the Quaker-founded liberal arts university - one of Iowa's oldest educational institutions, established 1873 - whose commitment to peace, equality, and education reflects the Quaker values of the founder community that gave Oskaloosa its progressive early character) to Mahaska County's significant bituminous coal mining heritage (the county's underground coal seams supported mining operations from the 1860s through the mid-20th century, shaping the community's labor culture and immigrant workforce in ways still visible in the community's heritage).
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
What do you need to do?
Tell us your goal and we'll guide you step-by-step to the right office, forms, and official resources.
Office: Mahaska County Emergency Management – confirm current contact via mahaskacountyia.gov.
Sheriff: Mahaska County Sheriff’s Office – Oskaloosa, IA. Notable as Iowa’s first county to have both a sheriff and a justice of the peace, following the county’s 1843 formation.
Notes: For an active emergency, call 911.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: US-63 and IA-92 serve Oskaloosa, the county seat, nicknamed “Osky.”
Notes: Mahaska County was formed in February 1843 and became self-governing February 5, 1844, named for Chief Mahaska of the Iowa people. Oskaloosa’s first European-American settlers arrived in 1835, led by Nathan Boone, the youngest son of frontiersman Daniel Boone; the city was incorporated in 1875.
Business & Permits
BUILDING & PERMITS
Office: Mahaska County Courthouse – Oskaloosa, IA (built 1885-86, first used February 27, 1886, architect Henry C. Koch; National Register of Historic Places; the second courthouse building in county history).
Notes: In the late 19th and early 20th centuries, Oskaloosa was a national center of bituminous coal mining, an era whose legacy includes the nearby former coal-mining community of Buxton – represented today by a preserved residence at the Nelson Pioneer Farm and Museum. The museum, operated by the Mahaska County Historical Society since 1964 on the 1843 homestead of Daniel and Margaret Nelson, gathers 14-15 historic structures from across the county – including a log cabin, blacksmith shop, one-room schoolhouse, Quaker meeting house, and the Buxton residence – and holds Native American artifacts alongside quilt and military collections. Oskaloosa is today home to William Penn University, a private university, and Lake Keomah State Park lies four miles east of the city.
Veterans Services
VETERANS SERVICES
Office: Mahaska County Veterans Affairs – confirm current contact via mahaskacountyia.gov.
Libraries
LIBRARIES
Oskaloosa Public Library (Oskaloosa) – confirm current address/phone via the county library system.
Parks & Recreation
PARKS & RECREATION
Key Assets: Nelson Pioneer Farm and Museum, Lake Keomah State Park, and William Penn University are the county’s premier heritage and recreational attractions.
Notes: The genuine, well-preserved pioneer and coal-mining heritage at Nelson Pioneer Farm – including a relocated residence from the historic Buxton mining community – is among the standout local history sites covered in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Mahaska County Assessor’s Office – confirm current contact via mahaskacountyia.gov.
Animal Services
ANIMAL SERVICES
Stephen Memorial Animal Shelter – 1716 Pella Avenue, Oskaloosa, IA 52577. Contracts with the City of Oskaloosa, Mahaska County, and several nearby towns for animal control services; cares for roughly 500-1,000 animals annually with a live-release rate around 90%+; runs a “Spay the County” low-income spay/neuter voucher program with the Mahaska Humane Society.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Mahaska County Environmental Health – confirm current contact via mahaskacountyia.gov.
NOTES: Mahaska County is the sixty-third county in Iowa’s Round 3 v2 redo, under the A+ sourced standard established for this project. The genuine, well-preserved pioneer and coal-mining heritage at Nelson Pioneer Farm is among the standout local history sites covered in this project. All contact information above was sourced via web search as of early August 2026 and should be reconfirmed directly with the relevant office before a visit, deadline-sensitive filing, or emergency-adjacent decision.
About Mahaska County
Mahaska County is south-central Iowa’s Quaker university and coal mining heritage county – William Penn University’s Quaker educational tradition and the underground coal mines that shaped the county’s working-class culture define an Iowa community with unusually deep historical roots.
Oskaloosa (the county seat, population ~11,500) is named for a Seminole leader’s wife – the city’s Quaker heritage, Nelson Pioneer Farm museum, and south Iowa regional role make it one of the area’s most historically significant small cities.
All Services
Browse every category and topic available for this county.
Mahaska County Assessor at 106 S. 1st Street, Oskaloosa, IA 52577, phone 641-673-3643. IA assessed at 100% market value with residential rollback.
Courts & Legal
Mahaska County District Court at 106 S. 1st Street, Oskaloosa, IA 52577, phone 641-673-7786, handles probate.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
CLERK OF DISTRICT COURT (Court Records, Marriage Licenses)
106 S. 1st Ave. E., Oskaloosa, IA 52577
(641) 673-7786
Genealogy
County-level record sources
Mahaska County District Court (probate/estate case files – see Probate section above).
Local societies
No dedicated Mahaska 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
Mahaska County District Court, 5th/8th Judicial District 106 South 1st Street, Oskaloosa, IA 52577 (641) 673-7786
Mahaska County is in south-central Iowa, seated in Oskaloosa; it is unique in Iowa for being served jointly by both the 5th and 8th Judicial Districts.
Step 1: figure out which path applies
Iowa has its own comprehensive probate code (Iowa Code Chapter 633) and has not formally adopted the Uniform Probate Code. Iowa offers several tracks depending on estate size and complexity:
Distribution by Affidavit (“very small estates”) – for estates where the gross value of personal property is $50,000 or less and there is no real estate, available 40 days after death under Iowa Code § 633.356. A sworn affidavit is presented directly to banks and other institutions. No court filing is required.
Small Estate Administration – a simplified probate process under Iowa Code Chapter 635 for estates with a gross value of $200,000 or less, with reduced notice requirements and court costs compared to full administration.
Regular (Full) Probate – standard administration through the district court for larger or more complex estates, which can be independent (unsupervised) or supervised.
Supervised Administration – closer court oversight, typically used for contested estates.
Step 2: filing for formal probate
File a Petition for Probate of Will and Appointment of Executor (if there’s a will) or a Petition for Administration (if intestate) with the Mahaska County District Court.
The court admits the will (if any) and issues Letters Testamentary (with a will) or Letters of Administration (intestate) appointing the personal representative.
Publish notice to creditors; under independent administration, creditors generally have 4 months from the date of first publication to file claims.
The personal representative inventories assets, pays valid debts and expenses, and – under independent administration – largely acts without ongoing court check-ins.
After the creditor period closes and debts are paid, the personal representative distributes assets to heirs or beneficiaries.
File a final accounting/final report; the court closes the estate upon approval.
What it costs
Personal representative fees are capped by statute at 3% of the gross value of the probate estate (excluding life insurance) unless services are itemized; attorney fees follow a similar framework.
Recording fees at the county recorder run about $7 for the first page of a document and $5 for each additional page.
Typical timelines: Distribution by Affidavit – a minimum 40-day wait; independent (unsupervised) probate typically closes in 6-12 months, with the 4-month creditor period as the primary timing constraint.
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 S. 1st Ave. E., Oskaloosa, IA 52577
(641) 673-3411
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
COUNTY AUDITOR (Records, Elections, Finance)
106 S. 1st Ave. E., Oskaloosa, IA 52577
(641) 673-7786
ELECTIONS (County Auditor)
106 S. 1st Ave. E., Oskaloosa, IA 52577
(641) 673-7786
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Mahaska County Health Dept
(641) 672-2071
Iowa DHHS — Region 7
(800) 338-8366
Iowa Medicaid
(800) 338-8366
MercyOne Oskaloosa Medical Center
mercyone.org/oskaloosa (quality community hospital)
Public Health Information
PUBLIC HEALTH
Office: Mahaska County Public Health – confirm current contact via mahaskacountyia.gov.
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Last verified June 2026
County Facts
County Seat: Oskaloosa
Population: 22,000
Area: 571 sq mi
Established: 1843
Tier: 3
Public Records
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