Alleghany County area

Population and density of Alleghany County

The Census Bureau estimates that 11,479 people lived in Alleghany County on July 1, 2025. That ranks #2,389 of 3,222 county equivalents nationally and #93 of 100 in North Carolina. Since the April 1, 2020 estimates base of 10,879, the population has grown by 600 (+5.5%), compared with +7.2% for North Carolina as a whole.

With 234.8 square miles of land, that is 49 people per square mile (19 per km²), placing Alleghany County #1,575 nationally for density and #85 in North Carolina. The median county equivalent has 47 people per square mile; the North Carolina median is 116. Put another way, there are about 13 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 Alleghany County

1 incorporated place lies at least partly in Alleghany County. Together they are home to 1,918 people (16.7%); the other 9,561 (83.3%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Sparta town, with 1,918 residents in the county.

Metropolitan area

Alleghany 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 Alleghany County; 6 of them have most of their land inside the county, and the others mainly cover neighboring areas.

28623286272863128644286632866828675

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 Alleghany County

Alleghany County shares a land border with 4 county equivalents, including 1 in Virginia. Each of them has more land than Alleghany County. The largest neighbor is Wilkes County (753.7 mi²) and the smallest is Ashe County (426.3 mi²). Together with its neighbors, Alleghany County forms a block of 2,389.2 mi² of land, of which it holds 9.8%.

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

Alleghany County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 4.4 times as much. North Carolina’s county land could hold about 207 areas the size of Alleghany County.

Another way to picture it: the same land area would fill a square about 15.3 miles (24.7 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 Alleghany County?

Alleghany County has more land than 284 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 Alleghany County at #2,971 nationally by total area, 33 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 0.6%, compared with a national county-equivalent median of 1.2% — 0.6 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 Alleghany 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.