County outline
Where Greene County is located
Area breakdown
Land accounts for 99.2% of Greene County’s measured area and water for 0.8%. Its combined area converts to 1,861.4 square kilometers or approximately 459,965 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 712.738 | 1,845.983 | 456,152.3 |
| Water | 5.958 | 15.431 | 3,813.1 |
| Total | 718.696 | 1,861.414 | 459,965.4 |
How Greene County compares
By original Census land area, Greene County ranks #16 of 82 in Mississippi and #1282 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.257 times the Mississippi county-equivalent median of 567 square miles. It accounts for 1.5% of the combined county land area in the state.
See the complete Mississippi ranking · What counts as a county equivalent?
Population and density of Greene County
The Census Bureau estimates that 13,707 people lived in Greene County on July 1, 2025. That ranks #2,249 of 3,222 county equivalents nationally and #59 of 82 in Mississippi. Since the April 1, 2020 estimates base of 13,533, the population has grown by 174 (+1.3%), compared with −0.2% for Mississippi as a whole.
With 712.7 square miles of land, that is 19 people per square mile (7.4 per km²), placing Greene County #2,354 nationally for density and #67 in Mississippi. The median county equivalent has 47 people per square mile; the Mississippi median is 43. Put another way, there are about 33 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 13,531 | 13,667 | 13,587 | 13,645 | 13,687 | 13,707 |
| Change | — | +136 | −80 | +58 | +42 | +20 |
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 Greene County
3 incorporated places lie at least partly in Greene County. Together they are home to 4,296 people (31.3%); the other 9,411 (68.7%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Leakesville town, with 3,732 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Leakesville townCounty seat | 3,732 | −1.4% | 6.283 |
| McLain town | 315 | 0% | 3.391 |
| State Line townAlso in 1 other county | 249 | +7.8% | 4.264 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Greene County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Greene 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
7 ZIP Code Tabulation Areas have land in Greene County; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.
39362394233945139452394563946139476
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 Greene County
Greene County shares a land border with 5 county equivalents, including 2 in Alabama. It has more land than 2 of them. The largest neighbor is Mobile County (1,229.4 mi²) and the smallest is George County (478.7 mi²). Together with its neighbors, Greene County forms a block of 4,959.1 mi² of land, of which it holds 14.4%.
| Bordering county equivalent | Land mi² | Size vs. Greene | Compare |
|---|---|---|---|
| Mobile CountyAlabama | 1,229.4 | 1.7× larger | Compare |
| Washington CountyAlabama | 1,080.3 | 1.5× larger | Compare |
| Wayne County | 810.7 | 1.1× larger | Compare |
| Perry County | 647.3 | 1.1× smaller | Compare |
| George County | 478.7 | 1.5× smaller | Compare |
How big is Greene County compared with U.S. states?
Greene County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.5 times as much. Mississippi’s county land could hold about 66 areas the size of Greene County.
Another way to picture it: the same land area would fill a square about 26.7 miles (43 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 Greene County?
Greene County has more land than 1,940 of the other 3,221 county equivalents in the dataset.
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 Greene County at #1,372 nationally by total area, 90 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 0.8%, compared with a national county-equivalent median of 1.2% — 0.3 percentage points lower. 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 Greene County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1281 | Laurens County, South Carolina | 712.9 | Compare |
| #1282 | Greene County, Mississippi | 712.7 | This county |
| #1283 | Thomas County, Nebraska | 712.6 | Compare |
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 31.212845, -88.634811. 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: 1,845,983,895 m²; AWATER: 15,430,622 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Greene County?
Greene County, Mississippi has 712.7 square miles (1,846 km²) of land and 5.958 square miles of water, for a total area of 718.7 square miles. It ranks #1282 of 3,222 U.S. county equivalents by land area.
Is Greene County the largest county in Mississippi?
No. Greene County ranks #16 of 82 in Mississippi by land area. The largest is Yazoo County, with 922.3 square miles of land.
What counties border Greene County?
Greene County shares a land border with Perry County, George County, Wayne County, Washington County, Alabama, and Mobile County, Alabama.
What is the population of Greene County?
The Census Bureau estimates Greene County had 13,707 residents on July 1, 2025, ranking #2,249 of 3,222 county equivalents. That is 19 people per square mile of land.
What is the county seat of Greene County?
The county seat of Greene County is Leakesville.
What cities and towns are in Greene County?
Greene County has 3 incorporated places. The most populous are Leakesville town, McLain town, and State Line town; 9,411 residents live outside any incorporated place.
Is Greene County part of a metropolitan area?
No. Greene County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Greene County?
7 ZIP Code Tabulation Areas have land in Greene County, and 3 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Greene County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.5 times as much land.
How many acres of land are in Greene County?
The land measurement converts to approximately 456,152 acres. Including water, total area is approximately 459,965 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.