County · Northern Missouri

Sullivan County

Short answer

A small, agricultural north-Missouri county anchored by Milan, with a long-rooted Amish/Mennonite community, large-scale pork production, Locust Creek, and the usual rural-county machinery of personal property tax, plate-receipt paperwork, fence law, and gravel roads.

All counties All local notes

Towns, cities & local places in Sullivan County

Green CastleGreen CityLocust CreekMilan

Region: Northern Missouri
Local notes: 8
Notes nearby: 6
Nearby counties: 6

Property tax snapshot

Missouri has no single county rate. A bill is the sum of every taxing district on the parcel — county, school, city, fire, library, ambulance — and the school levy varies most within a county.

Estimate a bill Look up the exact rate

Practical guides

Common county next steps in Sullivan County

Use these when the local office, parcel, vehicle, or deadline matters.

Property tax estimator Estimate a real-property bill, then confirm the exact parcel value and levy locally. Personal property tax guide Sort January 1 vehicle ownership, paid receipts, and statements of non-assessment. Vehicle title checklist Plan the license-office trip around title timing, inspections, emissions, and receipts. Assessment appeal guide If a value looks wrong, start with the county deadline and evidence about market value.

Local notes

Local rules and costs to check in Sullivan County

Short notes on the taxes, paperwork, and local-government layers here — grouped by topic, each linking the official sources behind it.

Sullivan County uses Missouri's local-option fence law Sullivan County is a local-option fence-law county, where adjoining landowners can share the cost and upkeep of a division fence even if only one keeps livestock. Gravel and lettered roads are normal navigation here Rural Sullivan County depends on lettered state routes and county gravel roads, and whether a road is county-maintained or private decides who plows and grades it. Large-scale pork production is part of the county's economy Sullivan County has a history of large-scale hog operations, and anyone buying rural land should understand Missouri's permitting and right-to-farm framework from official sources rather than rumor. Private wells and septic systems on rural property Rural homes in Sullivan County often rely on private wells and on-site septic systems, which carry owner responsibilities and state rules that town water and sewer hide.

Local notes

Worth knowing in Sullivan County

History, rivers, lakes, and quirks that give the county some shape.

Milan's courthouse square has a mound, fire, and PWA story Milan is Sullivan County's office hub, and the courthouse-square story includes early courts in a home, a log courthouse, an old V-shaped mound, a 1908 fire, and a 1938 PWA-era courthouse. The Roy Blunt Reservoir is a water project with a road layer The Roy Blunt Reservoir, formerly the East Locust Creek Reservoir, shows how water supply, county roads, and regional planning meet in Sullivan County. Locust Creek is Sullivan County's rare prairie-stream anchor Locust Creek Conservation Area gives Sullivan County a public-land story built around a largely unchannelized prairie stream, wet bottoms, and flood-aware land use. Plain (Amish and Mennonite) neighbors in rural Sullivan County Rural Sullivan County and northern Missouri have plain (Amish and Mennonite) neighbors; expect horse-drawn buggies and family-run farm businesses, and confirm whether a settled community is active near you with the county clerk.

Official sources

Where to confirm it

A short set of official county and agency pages cited here. The other 12 source links stay with their individual notes.

University of Missouri Extension - Missouri Courthouses: Sullivan County Missouri Association of Counties - Sullivan County directory MoDOT - Roy Blunt Reservoir Transportation Improvement Project USDA NRCS - Roy Blunt/East Locust Creek Reservoir Final Supplemental Environmental Impact Statement FEMA Flood Map Service Center Missouri Department of Conservation Missouri Department of Conservation University of Missouri Extension State Historical Society of Missouri

Worth knowing nearby

Notes from the counties closest to Sullivan County

Source-checked notes from the nearest counties — the local layer often carries across the county line.

A horse-drawn hearse shares a room with Putnam County pen history Putnam County · Unionville's museum puts a horse-drawn hearse, a large loom, coal-mining tools, and the county's pen-and-dye history into one local collection. The Locust Creek Covered Bridge is the longest of Missouri's four survivors Linn County · Locust Creek Covered Bridge is a rare surviving covered bridge, but its best story is how roads, railroads, creek channels, and preservation all changed around it. Trenton's Rock Barn turns farm-fair history into a landmark Grundy County · The WPA Stock Barn and Pavilion in Trenton, usually called the Rock Barn, ties Grundy County's farm-fair life to New Deal stonework, 4-H and FFA exhibits, and community events at Eastside Park. The assessor values it, and the collector handles the bill Adair County · Adair County property tax questions split between the Assessor's value records and the Collector's tax bills, payments, and receipts. Mercer County tax questions split between assessor and collector Mercer County · Mercer County residents should route value, receipt, and non-assessment questions to the right courthouse office in Princeton. Schuyler County sits at the start of the Fabius River system Schuyler County · MDC's Fabius watershed inventory places the Middle Fabius and South Fabius sub-basin headwaters in Schuyler County, giving the county a real northeast-Missouri watershed role.

Nearby counties

Closest counties to Sullivan County

Nearby counties with their own local notes.

Putnam County A small, remote farm county on the Iowa border with Unionville as its seat. Linn County A small north-central Missouri farm county with a strong Pershing thread: the Gen. John J. Grundy County A small north-central Missouri farm county built around its seat, Trenton, which carries a college (North Central Missouri College) and a state park (Crowder) that are unusual anchors for a county this size. Adair County A northern-Missouri university county anchored by Kirksville, home to Truman State University and A.T. Still University (tied to the early history of osteopathic medicine). Mercer County A small, remote farm county on the Iowa line: Princeton is the seat and the reputed birthplace of Calamity Jane (Martha Jane Cannary), the Grand River drains the county, and agriculture, gravel roads, fence law, and rural wells and septic shape everyday life. Schuyler County A small, remote far-northern Missouri county on the Iowa line, anchored by the seat of Lancaster and dominated by agriculture.

Reviewed June 18, 2026. These notes are a starting point — confirm exact parcel, license, tax, or permit details with the Sullivan County office that controls each record.

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