Wayne County area

Wayne County, Missouri covers 774.1 square miles: 759.2 square miles of land and 14.9 square miles of water. Its county seat is Greenville. An estimated 10,782 people lived there in 2025.

Official Census measurements · GEOID 292232026 Gazetteer · retrieved September 27, 2026
Land area759.2 mi²
Water area14.9 mi²
Population (2025)10,782
People per mi²14

County outline

Generalized outline of Wayne County, Missouri
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Wayne County is located

Wayne County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 98.1% of Wayne County’s measured area and water for 1.9%. Its combined area converts to 2,004.8 square kilometers or approximately 495,401 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land759.1881,966.288485,880.3
Water14.87638.5299,520.6
Total774.0642,004.817495,401

How Wayne County compares

By original Census land area, Wayne County ranks #18 of 115 in Missouri and #1151 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 1.282 times the Missouri county-equivalent median of 592 square miles. It accounts for 1.1% of the combined county land area in the state.

See the complete Missouri ranking · What counts as a county equivalent?

Population and density of Wayne County

The Census Bureau estimates that 10,782 people lived in Wayne County on July 1, 2025. That ranks #2,430 of 3,222 county equivalents nationally and #80 of 115 in Missouri. Since the April 1, 2020 estimates base of 10,975, the population has declined by 193 (−1.8%), compared with +1.9% for Missouri as a whole.

With 759.2 square miles of land, that is 14 people per square mile (5.5 per km²), placing Wayne County #2,498 nationally for density and #94 in Missouri. The median county equivalent has 47 people per square mile; the Missouri median is 31. Put another way, there are about 45 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate10,93710,92410,80510,83210,85110,782
Change—−13−119+27+19−69

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Wayne County

4 incorporated places lie at least partly in Wayne County. Together they are home to 2,735 people (25.4%); the other 8,047 (74.6%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Piedmont city, with 1,862 residents in the county. The county seat, Greenville city, has 440 residents.

Incorporated placePopulation 2025Since 2020Land mi²
Piedmont city1,862−2.3%2.153
Greenville cityCounty seat440−2%0.675
Williamsville city274−1.1%0.323
Mill Spring village159−0.6%0.44

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Wayne County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Wayne County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.

ZIP codes

15 ZIP Code Tabulation Areas have land in Wayne County; 11 of them have most of their land inside the county, and the others mainly cover neighboring areas.

636366365563763637876393463937639446395063951639526395663957639646396663967

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Wayne County

Wayne County shares a land border with 7 county equivalents. It has more land than 5 of them. The largest neighbor is Stoddard County (823.1 mi²) and the smallest is Madison County (494.4 mi²). Together with its neighbors, Wayne County forms a block of 5,255.4 mi² of land, of which it holds 14.4%.

Map of Wayne County and the 7 county equivalents that border it Butler County, Missouri: 694.8 mi² landBollinger County, Missouri: 617.9 mi² landMadison County, Missouri: 494.4 mi² landReynolds County, Missouri: 808.5 mi² landIron County, Missouri: 550.3 mi² landStoddard County, Missouri: 823.1 mi² landCarter County, Missouri: 507.3 mi² land
Wayne County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. WayneCompare
Stoddard County823.11.1× largerCompare
Reynolds County808.51.1× largerCompare
Butler County694.81.1× smallerCompare
Bollinger County617.91.2× smallerCompare
Iron County550.31.4× smallerCompare
Carter County507.31.5× smallerCompare
Madison County494.41.5× smallerCompare

How big is Wayne County compared with U.S. states?

Wayne County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.4 times as much. Missouri’s county land could hold about 91 areas the size of Wayne County.

Land area: Wayne County and the closest-sized states
Wayne County759.2 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 27.6 miles (44.3 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Wayne County?

Wayne County has more land than 2,071 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Wayne County759.2 mi²
Missouri median592 mi²
National median604.5 mi²

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Wayne County at #1,231 nationally by total area, 80 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 1.9%, compared with a national county-equivalent median of 1.2% — 0.8 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Wayne County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#1150Washington County, Missouri759.9Compare
#1151Wayne County, Missouri759.2This county
#1152Yellow Medicine County, Minnesota759.1Compare

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.

Representative coordinates

The Census internal point is 37.113824, -90.456544. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.

Source and precision

U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,966,287,840 m²; AWATER: 38,528,854 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Wayne County?

Wayne County, Missouri has 759.2 square miles (1,966.3 km²) of land and 14.9 square miles of water, for a total area of 774.1 square miles. It ranks #1151 of 3,222 U.S. county equivalents by land area.

Is Wayne County the largest county in Missouri?

No. Wayne County ranks #18 of 115 in Missouri by land area. The largest is Texas County, with 1,177.3 square miles of land.

What counties border Wayne County?

Wayne County shares a land border with Butler County, Bollinger County, Madison County, Reynolds County, Iron County, Stoddard County, and Carter County.

What is the population of Wayne County?

The Census Bureau estimates Wayne County had 10,782 residents on July 1, 2025, ranking #2,430 of 3,222 county equivalents. That is 14 people per square mile of land.

What is the county seat of Wayne County?

The county seat of Wayne County is Greenville.

What cities and towns are in Wayne County?

Wayne County has 4 incorporated places. The most populous are Piedmont city, Greenville city, Williamsville city, and Mill Spring village; 8,047 residents live outside any incorporated place.

Is Wayne County part of a metropolitan area?

No. Wayne County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Wayne County?

15 ZIP Code Tabulation Areas have land in Wayne County, and 11 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Wayne County compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 1.4 times as much land.

How many acres of land are in Wayne County?

The land measurement converts to approximately 485,880 acres. Including water, total area is approximately 495,401 acres. One square mile equals 640 acres.

Why might another source show a different area?

Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.

Can this establish a property boundary?

No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.

Cite this county

Download the complete CSV or JSON dataset