County outline
Where Walthall County is located
Area breakdown
Land accounts for 99.9% of Walthall County’s measured area and water for 0.1%. Its combined area converts to 1,047.4 square kilometers or approximately 258,819 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 403.928 | 1,046.169 | 258,513.9 |
| Water | 0.477 | 1.235 | 305.3 |
| Total | 404.405 | 1,047.404 | 258,819.2 |
How Walthall County compares
By original Census land area, Walthall County ranks #81 of 82 in Mississippi and #2504 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.712 times the Mississippi county-equivalent median of 567 square miles. It accounts for 0.9% of the combined county land area in the state.
See the complete Mississippi ranking · What counts as a county equivalent?
Population and density of Walthall County
The Census Bureau estimates that 13,928 people lived in Walthall County on July 1, 2025. That ranks #2,240 of 3,222 county equivalents nationally and #58 of 82 in Mississippi. Since the April 1, 2020 estimates base of 13,883, the population has grown by 45 (+0.3%), compared with −0.2% for Mississippi as a whole.
With 403.9 square miles of land, that is 34 people per square mile (13 per km²), placing Walthall County #1,882 nationally for density and #47 in Mississippi. The median county equivalent has 47 people per square mile; the Mississippi median is 43. Put another way, there are about 19 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 13,869 | 13,833 | 13,806 | 13,827 | 13,845 | 13,928 |
| Change | — | −36 | −27 | +21 | +18 | +83 |
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 Walthall County
1 incorporated place lies at least partly in Walthall County. Together they are home to 1,486 people (10.7%); the other 12,442 (89.3%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Tylertown town, with 1,486 residents in the county.
Metropolitan area
Walthall County is an outlying county of the McComb, MS Micropolitan Statistical Area. Its 2 county equivalents have 52,640 residents on 813.1 square miles of land; Walthall County accounts for 49.7% of the land and 26.5% of the residents. By combined land it ranks #258 of 542 micropolitan areas, and #207 by population.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Pike County | 38,712 | 409.2 |
| Walthall County | 13,928 | 403.9 |
ZIP codes
6 ZIP Code Tabulation Areas have land in Walthall County; 1 of them have most of their land inside the county, and the others mainly cover neighboring areas.
394783948339641396433965739667
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 Walthall County
Walthall County shares a land border with 5 county equivalents, including 1 in Louisiana. Each of them has more land than Walthall County. The largest neighbor is Washington Parish (669.6 mi²) and the smallest is Pike County (409.2 mi²). Together with its neighbors, Walthall County forms a block of 3,041.9 mi² of land, of which it holds 13.3%.
| Bordering county equivalent | Land mi² | Size vs. Walthall | Compare |
|---|---|---|---|
| Washington ParishLouisiana | 669.6 | 1.7× larger | Compare |
| Lincoln County | 586.2 | 1.5× larger | Compare |
| Marion County | 542.3 | 1.3× larger | Compare |
| Lawrence County | 430.6 | 1.1× larger | Compare |
| Pike County | 409.2 | about the same | Compare |
How big is Walthall County compared with U.S. states?
Walthall County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.6 times as much. Mississippi’s county land could hold about 116 areas the size of Walthall County.
Another way to picture it: the same land area would fill a square about 20.1 miles (32.3 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 Walthall County?
Walthall County has more land than 718 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 Walthall County at #2,580 nationally by total area, 76 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 0.1%, compared with a national county-equivalent median of 1.2% — 1.1 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 Walthall County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #2503 | Tate County, Mississippi | 404.8 | Compare |
| #2504 | Walthall County, Mississippi | 403.9 | This county |
| #2505 | Morgan County, Indiana | 403.9 | 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 31.164492, -90.103431. 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: 1,046,169,277 m²; AWATER: 1,236,552 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 Walthall County?
Walthall County, Mississippi has 403.9 square miles (1,046.2 km²) of land and 0.477 square miles of water, for a total area of 404.4 square miles. It ranks #2504 of 3,222 U.S. county equivalents by land area.
Is Walthall County the largest county in Mississippi?
No. Walthall County ranks #81 of 82 in Mississippi by land area. The largest is Yazoo County, with 922.3 square miles of land.
What counties border Walthall County?
Walthall County shares a land border with Marion County, Washington Parish, Louisiana, Pike County, Lawrence County, and Lincoln County.
What is the population of Walthall County?
The Census Bureau estimates Walthall County had 13,928 residents on July 1, 2025, ranking #2,240 of 3,222 county equivalents. That is 34 people per square mile of land.
What is the county seat of Walthall County?
The county seat of Walthall County is Tylertown.
Is Walthall County part of a metropolitan area?
Yes. It is an outlying county of the McComb, MS Micropolitan Statistical Area, which has 2 county equivalents and 52,640 residents.
How many ZIP codes are in Walthall County?
6 ZIP Code Tabulation Areas have land in Walthall County, and 1 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Walthall County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 2.6 times as much land.
How many acres of land are in Walthall County?
The land measurement converts to approximately 258,514 acres. Including water, total area is approximately 258,819 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.