Dinwiddie County area

Population and density of Dinwiddie County

The Census Bureau estimates that 28,896 people lived in Dinwiddie County on July 1, 2025. That ranks #1,520 of 3,222 county equivalents nationally and #64 of 133 in Virginia. Since the April 1, 2020 estimates base of 27,934, the population has grown by 962 (+3.4%), compared with +2.9% for Virginia as a whole.

With 503.8 square miles of land, that is 57 people per square mile (22 per km²), placing Dinwiddie County #1,426 nationally for density and #96 in Virginia. The median county equivalent has 47 people per square mile; the Virginia median is 109. Put another way, there are about 11 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 Dinwiddie County

1 incorporated place lies at least partly in Dinwiddie County. Together they are home to 469 people (1.6%); the other 28,427 (98.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is McKenney town, with 469 residents in the county.

Metropolitan area

Dinwiddie County is a central county of the Richmond, VA Metropolitan Statistical Area. Its 17 county equivalents have 1,389,338 residents on 4,367.8 square miles of land; Dinwiddie County accounts for 11.5% of the land and 2.1% of the residents. By combined land it ranks #62 of 393 metropolitan areas, and #45 by population.

ZIP codes

12 ZIP Code Tabulation Areas have land in Dinwiddie County; 8 of them have most of their land inside the county, and the others mainly cover neighboring areas.

238032380523824238302383323840238412385023872238822388523894

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 Dinwiddie County

Dinwiddie County shares a land border with 8 county equivalents. It has more land than 7 of them. The largest neighbor is Brunswick County (566.4 mi²) and the smallest is Petersburg city (22.7 mi²). Together with its neighbors, Dinwiddie County forms a block of 3,237.1 mi² of land, of which it holds 15.6%.

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

Dinwiddie County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.1 times as much. Virginia’s county land could hold about 78 areas the size of Dinwiddie County.

Another way to picture it: the same land area would fill a square about 22.4 miles (36.1 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 Dinwiddie County?

Dinwiddie County has more land than 1,158 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 Dinwiddie County at #2,146 nationally by total area, 82 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 0.7%, compared with a national county-equivalent median of 1.2% — 0.5 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 Dinwiddie 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.