Snyder County area

Population and density of Snyder County

The Census Bureau estimates that 39,655 people lived in Snyder County on July 1, 2025. That ranks #1,220 of 3,222 county equivalents nationally and #52 of 67 in Pennsylvania. Since the April 1, 2020 estimates base of 39,736, the population has declined by 81 (−0.2%), compared with +0.4% for Pennsylvania as a whole.

With 328.8 square miles of land, that is 121 people per square mile (47 per km²), placing Snyder County #874 nationally for density and #37 in Pennsylvania. The median county equivalent has 47 people per square mile; the Pennsylvania median is 137. Put another way, there are about 5.3 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 Snyder County

Snyder County is divided into 21 municipalities and townships. In Pennsylvania, county subdivisions are local governments, and together they cover all of the county’s land and residents.

The most populous is Selinsgrove borough, with 5,488 residents (13.8% of the county). The largest by land is Spring township, at 37.1 mi², or 11.3% of the county’s land. The county seat, Middleburg borough, has 1,302 residents. Among those with at least 1,000 residents in 2020, Monroe township grew fastest since then (+1.8%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Snyder County. Land: 2026 Census Gazetteer. How communities are listed.

Metropolitan area

Snyder County is a central county of the Selinsgrove, PA Micropolitan Statistical Area. Snyder County is the area’s only county equivalent, so the micro area has the same 328.8 square miles of land. By combined land it ranks #514 of 542 micropolitan areas, and #324 by population. It belongs to the Bloomsburg-Berwick-Sunbury, PA Combined Statistical Area.

ZIP codes

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

170451706317086178121781317827178411784217853178611786217864178701787617889

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 Snyder County

Snyder County shares a land border with 4 county equivalents. It has more land than 1 of them. The largest neighbor is Northumberland County (457.7 mi²) and the smallest is Union County (316 mi²). Together with its neighbors, Snyder County forms a block of 1,904.8 mi² of land, of which it holds 17.3%.

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

Snyder County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 3.1 times as much. Pennsylvania’s county land could hold about 136 areas the size of Snyder County.

Another way to picture it: the same land area would fill a square about 18.1 miles (29.2 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 Snyder County?

Snyder County has more land than 482 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 Snyder County at #2,779 nationally by total area, 39 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 0.8%, compared with a national county-equivalent median of 1.2% — 0.3 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 Snyder 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.