Adams County area

Population and density of Adams County

The Census Bureau estimates that 30,061 people lived in Adams County on July 1, 2025. That ranks #1,484 of 3,222 county equivalents nationally and #26 of 82 in Mississippi. Since the April 1, 2020 estimates base of 29,542, the population has grown by 519 (+1.8%), compared with −0.2% for Mississippi as a whole.

With 462.3 square miles of land, that is 65 people per square mile (25 per km²), placing Adams County #1,322 nationally for density and #22 in Mississippi. The median county equivalent has 47 people per square mile; the Mississippi median is 43. Put another way, there are about 9.8 acres of land per resident.

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 Adams County

1 incorporated place lies at least partly in Adams County. Together they are home to 14,880 people (49.5%); the other 15,181 (50.5%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Natchez city, with 14,880 residents in the county.

Metropolitan area

Adams County is a central county of the Natchez, MS-LA Micropolitan Statistical Area. Its 3 county equivalents have 54,722 residents on 1,678 square miles of land; Adams County accounts for 27.6% of the land and 54.9% of the residents. By combined land it ranks #98 of 542 micropolitan areas, and #193 by population.

ZIP codes

2 ZIP Code Tabulation Areas have land in Adams County; 1 of them have most of their land inside the county, and the others mainly cover neighboring areas.

3912039661

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 Adams County

Adams County shares a land border with 5 county equivalents, including 2 in Louisiana. Each of them has more land than Adams County. The largest neighbor is Concordia Parish (695.7 mi²) and the smallest is Jefferson County (519.9 mi²). Together with its neighbors, Adams County forms a block of 3,523.3 mi² of land, of which it holds 13.1%.

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

Adams County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.2 times as much. Mississippi’s county land could hold about 101 areas the size of Adams County.

Another way to picture it: the same land area would fill a square about 21.5 miles (34.6 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 Adams County?

Adams County has more land than 1,000 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 Adams County at #2,223 nationally by total area, 1 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 5.2%, compared with a national county-equivalent median of 1.2% — 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 Adams County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

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.