County outline
Where Lebanon County is located
Area breakdown
Land accounts for 99.8% of Lebanon County’s measured area and water for 0.2%. Its combined area converts to 938.9 square kilometers or approximately 232,000 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 361.835 | 937.148 | 231,574.4 |
| Water | 0.665 | 1.722 | 425.6 |
| Total | 362.5 | 938.871 | 232,000 |
How Lebanon County compares
By original Census land area, Lebanon County ranks #60 of 67 in Pennsylvania and #2647 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.554 times the Pennsylvania county-equivalent median of 653.3 square miles. It accounts for 0.8% of the combined county land area in the state.
See the complete Pennsylvania ranking · What counts as a county equivalent?
Population and density of Lebanon County
The Census Bureau estimates that 146,380 people lived in Lebanon County on July 1, 2025. That ranks #473 of 3,222 county equivalents nationally and #24 of 67 in Pennsylvania. Since the April 1, 2020 estimates base of 143,252, the population has grown by 3,128 (+2.2%), compared with +0.4% for Pennsylvania as a whole.
With 361.8 square miles of land, that is 405 people per square mile (156 per km²), placing Lebanon County #406 nationally for density and #15 in Pennsylvania. The median county equivalent has 47 people per square mile; the Pennsylvania median is 137. Put another way, there are about 1.6 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 143,272 | 143,785 | 144,037 | 144,706 | 145,392 | 146,380 |
| Change | — | +513 | +252 | +669 | +686 | +988 |
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 Lebanon County
Lebanon County is divided into 26 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 Lebanon city, with 26,479 residents (18.1% of the county). The largest by land is Bethel township, at 34.6 mi², or 9.6% of the county’s land. Among those with at least 1,000 residents in 2020, North Cornwall township grew fastest since then (+13.8%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Lebanon cityCounty seat | 26,479 | −1.1% | 4.167 | 1.2% |
| North Lebanon township | 12,366 | +2.6% | 16.8 | 4.6% |
| South Lebanon township | 10,735 | +3.1% | 21.7 | 6% |
| North Cornwall township | 9,661 | +13.8% | 9.498 | 2.6% |
| Jackson township | 9,348 | +0.2% | 24.1 | 6.6% |
| North Londonderry township | 9,109 | +2.3% | 10.7 | 3% |
| South Londonderry township | 8,940 | +1.8% | 24.4 | 6.7% |
| Palmyra borough | 7,762 | −0.9% | 1.923 | 0.5% |
| Bethel township | 5,491 | +6.8% | 34.6 | 9.6% |
| Swatara township | 5,073 | +0.3% | 21.6 | 6% |
| Annville township | 5,037 | +5.9% | 1.622 | 0.4% |
| Cornwall borough | 4,698 | +2.2% | 9.703 | 2.7% |
| Millcreek township | 4,443 | +2.3% | 20.4 | 5.6% |
| Heidelberg township | 4,170 | +0.9% | 24.2 | 6.7% |
| South Annville township | 3,517 | +2.4% | 19.5 | 5.4% |
Show the other 11 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Myerstown borough | 3,157 | +2% | 0.856 |
| Union township | 2,932 | −0.2% | 29.6 |
| East Hanover township | 2,715 | +2.2% | 32.5 |
| North Annville township | 2,324 | +2.1% | 17.3 |
| West Cornwall township | 2,072 | +2.3% | 8.644 |
| Cleona borough | 2,055 | +2.1% | 0.834 |
| Jonestown borough | 1,666 | +2.3% | 0.634 |
| Richland borough | 1,524 | +2.1% | 1.385 |
| West Lebanon township | 853 | +2.4% | 0.387 |
| Mount Gretna borough | 193 | +2.1% | 0.144 |
| Cold Spring township | 60 | +3.4% | 24.8 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Lebanon County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Lebanon County is a central county of the Lebanon, PA Metropolitan Statistical Area. Lebanon County is the area’s only county equivalent, so the metro area has the same 361.8 square miles of land. By combined land it ranks #384 of 393 metropolitan areas, and #301 by population. It belongs to the Harrisburg-York-Lebanon, PA Combined Statistical Area.
ZIP codes
21 ZIP Code Tabulation Areas have land in Lebanon County; 16 of them have most of their land inside the county, and the others mainly cover neighboring areas.
170031701017016170261702817033170381703917041170421704617064170671707317077170781708717088175451796319551
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 Lebanon County
Lebanon County shares a land border with 4 county equivalents. Each of them has more land than Lebanon County. The largest neighbor is Lancaster County (943.9 mi²) and the smallest is Dauphin County (524.9 mi²). Together with its neighbors, Lebanon County forms a block of 3,465.8 mi² of land, of which it holds 10.4%.
| Bordering county equivalent | Land mi² | Size vs. Lebanon | Compare |
|---|---|---|---|
| Lancaster County | 943.9 | 2.6× larger | Compare |
| Berks County | 856.4 | 2.4× larger | Compare |
| Schuylkill County | 778.8 | 2.2× larger | Compare |
| Dauphin County | 524.9 | 1.5× larger | Compare |
How big is Lebanon County compared with U.S. states?
Lebanon County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.9 times as much. Pennsylvania’s county land could hold about 124 areas the size of Lebanon County.
Another way to picture it: the same land area would fill a square about 19 miles (30.6 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 Lebanon County?
Lebanon County has more land than 575 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 Lebanon County at #2,705 nationally by total area, 58 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 0.2%, compared with a national county-equivalent median of 1.2% — 1 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 Lebanon County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #2646 | DeKalb County, Indiana | 362.8 | Compare |
| #2647 | Lebanon County, Pennsylvania | 361.8 | This county |
| #2648 | Cabarrus County, North Carolina | 361.3 | Compare |
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.
Representative coordinates
The Census internal point is 40.371344, -76.464654. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 937,148,927 m²; AWATER: 1,722,125 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Lebanon County?
Lebanon County, Pennsylvania has 361.8 square miles (937.1 km²) of land and 0.665 square miles of water, for a total area of 362.5 square miles. It ranks #2647 of 3,222 U.S. county equivalents by land area.
Is Lebanon County the largest county in Pennsylvania?
No. Lebanon County ranks #60 of 67 in Pennsylvania by land area. The largest is Lycoming County, with 1,228.9 square miles of land.
What counties border Lebanon County?
Lebanon County shares a land border with Dauphin County, Lancaster County, Berks County, and Schuylkill County.
What is the population of Lebanon County?
The Census Bureau estimates Lebanon County had 146,380 residents on July 1, 2025, ranking #473 of 3,222 county equivalents. That is 405 people per square mile of land.
What is the county seat of Lebanon County?
The county seat of Lebanon County is Lebanon.
What cities and towns are in Lebanon County?
Lebanon County has 26 county subdivisions (cities, towns and townships). The most populous five are Lebanon city, North Lebanon township, South Lebanon township, North Cornwall township, and Jackson township.
Is Lebanon County part of a metropolitan area?
Yes. It is a central county of the Lebanon, PA Metropolitan Statistical Area.
How many ZIP codes are in Lebanon County?
21 ZIP Code Tabulation Areas have land in Lebanon County, and 16 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Lebanon County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 2.9 times as much land.
How many acres of land are in Lebanon County?
The land measurement converts to approximately 231,574 acres. Including water, total area is approximately 232,000 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.