Boyle County area

Population and density of Boyle County

The Census Bureau estimates that 31,632 people lived in Boyle County on July 1, 2025. That ranks #1,436 of 3,222 county equivalents nationally and #33 of 120 in Kentucky. Since the April 1, 2020 estimates base of 30,614, the population has grown by 1,018 (+3.3%), compared with +2.2% for Kentucky as a whole.

With 180.3 square miles of land, that is 175 people per square mile (68 per km²), placing Boyle County #689 nationally for density and #17 in Kentucky. The median county equivalent has 47 people per square mile; the Kentucky median is 59. Put another way, there are about 3.6 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 Boyle County

3 incorporated places lie at least partly in Boyle County. Together they are home to 20,881 people (66%); the other 10,751 (34%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Danville city, with 17,736 residents in the county. Among places with at least 1,000 residents in 2020, Junction City city grew fastest since then (+3.5%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Boyle County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Boyle County is a central county of the Danville, KY Micropolitan Statistical Area. Its 2 county equivalents have 56,985 residents on 513.2 square miles of land; Boyle County accounts for 35.1% of the land and 55.5% of the residents. By combined land it ranks #424 of 542 micropolitan areas, and #183 by population.

ZIP codes

5 ZIP Code Tabulation Areas have land in Boyle County; 4 of them have most of their land inside the county, and the others mainly cover neighboring areas.

4032840422404404046440468

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 Boyle County

Boyle County shares a land border with 6 county equivalents. Each of them has more land than Boyle County. The largest neighbor is Casey County (444.3 mi²) and the smallest is Garrard County (229.9 mi²). Together with its neighbors, Boyle County forms a block of 2,077.6 mi² of land, of which it holds 8.7%.

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

Boyle County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 5.7 times as much. Kentucky’s county land could hold about 219 areas the size of Boyle County.

Another way to picture it: the same land area would fill a square about 13.4 miles (21.6 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 Boyle County?

Boyle County has more land than 194 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 Boyle County at #3,049 nationally by total area, 21 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 1.4%, compared with a national county-equivalent median of 1.2% — 0.2 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 Boyle 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.