A Landlord’s Guide to Renting in Mercer County, Missouri
Mercer County sits at the top of Missouri, its northern boundary touching Iowa, its gentle terrain of rolling farmland and timber stretching across 455 square miles of some of the state’s most sparsely populated land. Organized February 14, 1845 from part of Grundy County and named for General Hugh Mercer, a Revolutionary War hero who died at the Battle of Princeton, the county has a 2020 census population of just 3,538 — making it the second-least populous county in Missouri. Only Worth County, to the west, is smaller. For a landlord, that population figure is the single most important fact to understand about Mercer County: every aspect of operating here flows from the reality that this is one of the quietest, most rural, most thinly settled corners of Missouri.
Princeton: Calamity Jane’s Birthplace
Princeton, with approximately 974 to 1,007 residents, is the county seat and by far the county’s largest community. It is a compact agricultural service town on US-65 in north-central Mercer County. Princeton holds a notable place in American frontier history as the birthplace of Martha Jane Cannary — Calamity Jane — the frontierswoman, scout, and performer born here around 1852 who became one of the iconic figures of the American West. The city has embraced this heritage as part of its identity.
Princeton’s economy is grounded in county government employment, agricultural services, healthcare, and retail serving the surrounding rural area. US-65 connects Princeton south 24 miles to Trenton (Grundy County seat) and north 13 miles to the Iowa border, giving residents access to a corridor that links to Des Moines to the north and Kansas City to the south. The Trenton connection is economically meaningful — Trenton has a larger retail and healthcare base, and some Princeton residents commute there for employment or services.
The Amish Community and Agricultural Economy
Mercer County hosts an active and well-established Amish community, a distinctive feature of the county’s cultural and economic landscape. Amish families in the county are engaged primarily in farming, woodworking, and related trades. Amish community members typically do not rent conventional housing, but their presence contributes to the county’s identity as a place with deep roots in traditional agricultural values. The broader county economy is oriented almost entirely toward livestock and row crop agriculture, with hunting — Mercer County is one of Missouri’s premier whitetail deer and turkey destinations — providing seasonal economic activity and drawing visitors from across the region.
The hunting economy creates a niche rental market that landlords may find worth exploring: hunting cabin or rural property rentals for seasonal use. This is distinct from the conventional residential rental market and governed by different practical considerations, but it represents one of the few economic drivers in the county that creates housing demand beyond the permanent resident base.
The Rental Market: Expectations and Reality
With approximately 25% of occupied housing units renter-occupied in a county of only 3,538 people, the universe of prospective residential tenants in Mercer County at any given time is genuinely very small — a few hundred households at most. Vacancy periods between tenants will be longer than in virtually any other market in Missouri. Landlords should budget for vacancy periods of 90 to 180 days as a realistic baseline and price units at rates calibrated to what the local market will actually bear. The temptation to hold out for higher rents or more qualified applicants than the market can supply is particularly risky in a county where finding the next applicant may take months.
The county’s poverty rate of approximately 13.3% is above the state average, and income verification remains important. However, Mercer County’s income profile has improved somewhat in recent years, with the 2024 median household income estimated at approximately $62,679 — stronger than many comparable rural Missouri counties. This reflects the county’s relatively stable agricultural economy and the income earned by farm operators, who may have modest cash income but significant asset wealth in land and equipment. For agricultural applicants, use prior-year tax returns to assess annual income rather than relying solely on recent pay stubs.
The 3rd Judicial Circuit
All Mercer County evictions file with the 3rd Judicial Circuit at the Mercer County Courthouse, 802 East Main Street, Princeton, MO 64673. Circuit Clerk: (660) 748-4335. Call ahead to confirm current office hours before filing, as hours in small county courthouses can vary. The 3rd Circuit also serves Harrison, Putnam, and Sullivan counties; all Mercer County matters file in Princeton. Missouri’s eviction procedure applies uniformly: for nonpayment, serve a written demand for rent immediately and file upon nonpayment or failure to vacate; for lease violations, a 10-day notice to quit is required under RSMo Chapter 441. LLCs and business entities must retain a licensed Missouri attorney. Uncontested evictions in the 3rd Circuit typically resolve within 20 to 45 days from filing, with light dockets in a low-population county potentially accelerating scheduling.
Missouri has no cap on security deposit amounts. Return with an itemized statement within 30 days of move-out and key return per RSMo §535.300. Document move-in conditions thoroughly. In a county where the next available tenant may be months away, the cost of a security deposit dispute that prevents a smooth transition from one tenancy to the next is higher than the dispute itself might suggest. Clear documentation protects both parties and enables efficient turnover when it occurs.
Mercer County is a market for the patient, locally-connected landlord who values the county’s exceptional outdoor character and is prepared to manage through extended vacancy periods. The county’s beautiful land, strong agricultural economy, and genuine small-town community provide a foundation for stable long-term tenancies once the right tenants are found — but finding them requires realistic expectations and a long-horizon approach to property management.
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