County outline
Where Lauderdale County is located
Area breakdown
Land accounts for 98.4% of Lauderdale County’s measured area and water for 1.6%. Its combined area converts to 1,852.2 square kilometers or approximately 457,699 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 703.676 | 1,822.512 | 450,352.6 |
| Water | 11.478 | 29.728 | 7,345.9 |
| Total | 715.154 | 1,852.24 | 457,698.6 |
How Lauderdale County compares
By original Census land area, Lauderdale County ranks #18 of 82 in Mississippi and #1319 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.241 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 Lauderdale County
The Census Bureau estimates that 70,317 people lived in Lauderdale County on July 1, 2025. That ranks #798 of 3,222 county equivalents nationally and #9 of 82 in Mississippi. Since the April 1, 2020 estimates base of 72,980, the population has declined by 2,663 (−3.6%), compared with −0.2% for Mississippi as a whole.
With 703.7 square miles of land, that is 100 people per square mile (39 per km²), placing Lauderdale County #999 nationally for density and #12 in Mississippi. The median county equivalent has 47 people per square mile; the Mississippi median is 43. Put another way, there are about 6.4 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 72,678 | 72,055 | 71,342 | 70,888 | 70,527 | 70,317 |
| Change | — | −623 | −713 | −454 | −361 | −210 |
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 Lauderdale County
2 incorporated places lie at least partly in Lauderdale County. Together they are home to 35,091 people (49.9%); the other 35,226 (50.1%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Meridian city, with 33,370 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Meridian cityCounty seat | 33,370 | −4.8% | 53.7 |
| Marion town | 1,721 | −1.5% | 3.614 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Lauderdale County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Lauderdale County is a central county of the Meridian, MS Micropolitan Statistical Area. Its 2 county equivalents have 85,419 residents on 1,395.3 square miles of land; Lauderdale County accounts for 50.4% of the land and 82.3% of the residents. By combined land it ranks #121 of 542 micropolitan areas, and #59 by population.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Lauderdale County | 70,317 | 703.7 |
| Clarke County | 15,102 | 691.6 |
ZIP codes
12 ZIP Code Tabulation Areas have land in Lauderdale County; 9 of them have most of their land inside the county, and the others mainly cover neighboring areas.
393013930539307393093932039323393253932639330393353934239364
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 Lauderdale County
Lauderdale 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 Choctaw County (913.5 mi²) and the smallest is Newton County (577.8 mi²). Together with its neighbors, Lauderdale County forms a block of 4,556.5 mi² of land, of which it holds 15.4%.
| Bordering county equivalent | Land mi² | Size vs. Lauderdale | Compare |
|---|---|---|---|
| Choctaw CountyAlabama | 913.5 | 1.3× larger | Compare |
| Sumter CountyAlabama | 903.8 | 1.3× larger | Compare |
| Kemper County | 766.2 | 1.1× larger | Compare |
| Clarke County | 691.6 | about the same | Compare |
| Newton County | 577.8 | 1.2× smaller | Compare |
How big is Lauderdale County compared with U.S. states?
Lauderdale 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 67 areas the size of Lauderdale County.
Another way to picture it: the same land area would fill a square about 26.5 miles (42.7 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 Lauderdale County?
Lauderdale County has more land than 1,903 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 Lauderdale County at #1,398 nationally by total area, 79 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 1.6%, compared with a national county-equivalent median of 1.2% — 0.4 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 Lauderdale County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1318 | Montgomery County, Illinois | 703.8 | Compare |
| #1319 | Lauderdale County, Mississippi | 703.7 | This county |
| #1320 | Jackson County, Minnesota | 703 | 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 32.404017, -88.660451. 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: 1,822,511,106 m²; AWATER: 29,727,669 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 Lauderdale County?
Lauderdale County, Mississippi has 703.7 square miles (1,822.5 km²) of land and 11.5 square miles of water, for a total area of 715.2 square miles. It ranks #1319 of 3,222 U.S. county equivalents by land area.
Is Lauderdale County the largest county in Mississippi?
No. Lauderdale County ranks #18 of 82 in Mississippi by land area. The largest is Yazoo County, with 922.3 square miles of land.
What counties border Lauderdale County?
Lauderdale County shares a land border with Kemper County, Clarke County, Newton County, Sumter County, Alabama, and Choctaw County, Alabama.
What is the population of Lauderdale County?
The Census Bureau estimates Lauderdale County had 70,317 residents on July 1, 2025, ranking #798 of 3,222 county equivalents. That is 100 people per square mile of land.
What is the county seat of Lauderdale County?
The county seat of Lauderdale County is Meridian.
What cities and towns are in Lauderdale County?
Lauderdale County has 2 incorporated places. The most populous are Meridian city and Marion town; 35,226 residents live outside any incorporated place.
Is Lauderdale County part of a metropolitan area?
Yes. It is a central county of the Meridian, MS Micropolitan Statistical Area, which has 2 county equivalents and 85,419 residents.
How many ZIP codes are in Lauderdale County?
12 ZIP Code Tabulation Areas have land in Lauderdale County, and 9 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Lauderdale 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 Lauderdale County?
The land measurement converts to approximately 450,353 acres. Including water, total area is approximately 457,699 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.