Pennsylvania
Click the links below to view state facts.
Pennsylvania Population News Articles
Population Density
Historic & Projected Growth
Population by County
POPULATION DENSITY
People per square mile, 2010: 274.0
People per square mile, 2020: 290.6
HISTORIC & PROJECTED GROWTH 1790 TO 2040
Year |
Population |
1790 |
434,373 |
1800 |
602,365 |
1810 |
810,091 |
1820 |
1,049,458 |
1830 |
1,348,233 |
1840 |
1,724,033 |
1850 |
2,311,786 |
1860 |
2,906,215 |
1870 |
3,521,951 |
1880 |
4,282,891 |
1890 |
5,258,113 |
1900 |
6,302,115 |
1910 |
7,665,111 |
1920 |
8,720,017 |
1930 |
9,631,350 |
1940 |
9,900,180 |
1950 |
10,498,012 |
1960 |
11,319,366 |
1970 |
11,800,766 |
1980 |
11,864,720 |
1990 |
11,881,643 |
2000 |
12,281,054 |
2010 |
12,702,379 |
2020 |
13,002,700 |
2030 |
*12,946,245 |
2040 |
*12,809,150 |
Sources: Census figures from U.S. Bureau of the Census & *Estimates from Weldon Cooper Center, Demographics Research Group
(The Census Bureau and Weldon Cooper Center have not yet provided updated State projections to reflect 2020 census numbers.)
Population by County
Population By County |
Census 2020 Population |
Census 2010 Population |
Change from 2010 |
Percent Change |
PENNSYLVANIA |
13,002,700 |
12,702,379 |
300,321 |
2.31% |
Adams County |
103,852 |
101,407 |
2,445 |
2.35% |
Allegheny County |
1,250,578 |
1,223,348 |
27,230 |
2.18% |
Armstrong County |
65,558 |
68,941 |
-3,383 |
-5.16% |
Beaver County |
168,215 |
170,539 |
-2,324 |
-1.38% |
Bedford County |
47,577 |
49,762 |
-2,185 |
-4.59% |
Berks County |
428,849 |
411,442 |
17,407 |
4.06% |
Blair County |
122,822 |
127,089 |
-4,267 |
-3.47% |
Bradford County |
59,967 |
62,622 |
-2,655 |
-4.43% |
Bucks County |
646,538 |
625,249 |
21,289 |
3.29% |
Butler County |
193,763 |
183,862 |
9,901 |
5.11% |
Cambria County |
133,472 |
143,679 |
-10,207 |
-7.65% |
Cameron County |
4,547 |
5,085 |
-538 |
-11.83% |
Carbon County |
64,749 |
65,249 |
-500 |
-0.77% |
Centre County |
158,172 |
153,990 |
4,182 |
2.64% |
Chester County |
534,413 |
498,886 |
35,527 |
6.65% |
Clarion County |
37,241 |
39,988 |
-2,747 |
-7.38% |
Clearfield County |
80,562 |
81,642 |
-1,080 |
-1.34% |
Clinton County |
37,450 |
39,238 |
-1,788 |
-4.77% |
Columbia County |
64,727 |
67,295 |
-2,568 |
-3.97% |
Crawford County |
83,938 |
88,765 |
-4,827 |
-5.75% |
Cumberland County |
259,469 |
235,406 |
24,063 |
9.27% |
Dauphin County |
286,401 |
268,100 |
18,301 |
6.39% |
Delaware County |
576,830 |
558,979 |
17,851 |
3.09% |
Elk County |
30,990 |
31,946 |
-956 |
-3.08% |
Erie County |
270,876 |
280,566 |
-9,690 |
-3.58% |
Fayette County |
128,804 |
136,606 |
-7,802 |
-6.06% |
Forest County |
6,973 |
7,716 |
-743 |
-10.66% |
Franklin County |
155,932 |
149,618 |
6,314 |
4.05% |
Fulton County |
14,556 |
14,845 |
-289 |
-1.99% |
Greene County |
35,954 |
38,686 |
-2,732 |
-7.60% |
Huntingdon County |
44,092 |
45,913 |
-1,821 |
-4.13% |
Indiana County |
83,246 |
88,880 |
-5,634 |
-6.77% |
Jefferson County |
44,492 |
45,200 |
-708 |
-1.59% |
Juniata County |
23,509 |
24,636 |
-1,127 |
-4.79% |
Lackawanna County |
215,896 |
214,437 |
1,459 |
0.68% |
Lancaster County |
552,984 |
519,445 |
33,539 |
6.07% |
Lawrence County |
86,070 |
91,108 |
-5,038 |
-5.85% |
Lebanon County |
143,257 |
133,568 |
9,689 |
6.76% |
Lehigh County |
374,557 |
349,497 |
25,060 |
6.69% |
Luzerne County |
325,594 |
320,918 |
4,676 |
1.44% |
Lycoming County |
114,188 |
116,111 |
-1,923 |
-1.68% |
McKean County |
40,432 |
43,450 |
-3,018 |
-7.46% |
Mercer County |
110,652 |
116,638 |
-5,986 |
-5.41% |
Mifflin County |
46,143 |
46,682 |
-539 |
-1.17% |
Monroe County |
168,327 |
169,842 |
-1,515 |
-0.90% |
Montgomery County |
856,553 |
799,874 |
56,679 |
6.62% |
Montour County |
18,136 |
18,267 |
-131 |
-0.72% |
Northampton County |
312,951 |
297,735 |
15,216 |
4.86% |
Northumberland County |
91,647 |
94,528 |
-2,881 |
-3.14% |
Perry County |
45,842 |
45,969 |
-127 |
-0.28% |
Philadelphia County |
1,603,797 |
1,526,006 |
77,791 |
4.85% |
Pike County |
58,535 |
57,369 |
1,166 |
1.99% |
Potter County |
16,396 |
17,457 |
-1,061 |
-6.47% |
Schuylkill County |
143,049 |
148,289 |
-5,240 |
-3.66% |
Snyder County |
39,736 |
39,702 |
34 |
0.09% |
Somerset County |
74,129 |
77,742 |
-3,613 |
-4.87% |
Sullivan County |
5,840 |
6,428 |
-588 |
-10.07% |
Susquehanna County |
38,434 |
43,356 |
-4,922 |
-12.81% |
Tioga County |
41,045 |
41,981 |
-936 |
-2.28% |
Union County |
42,681 |
44,947 |
-2,266 |
-5.31% |
Venango County |
50,454 |
54,984 |
-4,530 |
-8.98% |
Warren County |
38,587 |
41,815 |
-3,228 |
-8.37% |
Washington County |
209,349 |
207,820 |
1,529 |
0.73% |
Wayne County |
51,155 |
52,822 |
-1,667 |
-3.26% |
Westmoreland County |
354,663 |
365,169 |
-10,506 |
-2.96% |
Wyoming County |
26,069 |
28,276 |
-2,207 |
-8.47% |
York County |
456,438 |
434,972 |
21,466 |
4.70% |
SOURCE: U.S. Bureau of the Census
Population News Articles
HOW THE SUPREME COURT’S ‘GOOD NEIGHBOR’ RULING COULD IMPACT AIR QUALITY IN PENNSYLVANIA – July 11, 2024
IN U.S., OVERALL EMISSIONS DOWN AS OIL AND GAS PRODUCTION RISES — BUT IN PA. REGION, EMISSIONS ARE UP – July 11, 2024
Where are the 14 fastest growing towns in Pennsylvania? See if your hometown made the list – July 8, 2024
County votes for ‘non-sanctuary’ status to protect residents from illegal immigration – June 20, 2024
CLIMATE CHANGE IS MAKING HEAT WAVES LIKE THIS WEEK’S MORE COMMON AND SEVERE IN PA. – June 19, 2024
Pennsylvania Commits to Preserving Farmland with $9.8 Million Investment – June 16, 2024
Pennsylvania to See Increase in Extreme Weather Events – November 17, 2023
Pa. leads the nation for Lyme disease cases. Development in forests boosts the risk – November 13, 2023
HOW LAWN CARE IS CAUSING EXTREME AIR POLLUTION IN PA. – November 8, 2023
At Shippensburg University, Latino community members talk about climate change challenges, possible solutions – November 2, 2023
“Forever chemicals” in Pennsylvania fracking wells could impact health of surrounding communities: Report – October 25. 2023
Center for Rural Pennsylvania releases Pa. population projections through 2050 – October 16, 2023
Report: Central PA is eighth most polluted area in United States – July 3, 2023
FirstEnergy Developing Pollinator Habitat Along Pennsylvania Transmission Line – July 13, 2023
Penn State study aims to help Pa. dairy farmers cut methane — and show carbon offsets are real – July 19, 2023
Pittsburgh-area hospitals tackling climate emissions, pollution and waste – July 25, 2023
Air quality is better, but lung association still gives Bucks an “F” – July 20, 2023
Pennsylvania now has limits on forever chemicals, ahead of federal standards – January 17, 2023
As Pennsylvania loses more residents, central PA tips the scale in the other direction – January 11, 2023
Gas company pleads no contest in Pennsylvania fracking pollution case, but fracking allowed to resume – January 11, 2023
Slippy slopes: Pittsburgh, built on slide-prone riverbanks, could face a deluge of impacts from climate change – January 5, 2023
Pa. 5th most populous state in 2022 despite population decline: Census Bureau – December 22, 2022
With millions in federal funding, PennDOT charges ahead on EV infrastructure development in Pa. – July 28, 2022
What to know about Pa. DEP’s newest plan to reduce pollution to the Chesapeake Bay – July 26, 2022
Report: Pennsylvania has a housing deficit of 98,000 units, rent-burdened population – July 15, 2022
Endangered Species in Pennsylvania, according to the Pennsylvania Game Commission – July 15, 2022
Climate change could make prescribed fires in Pennsylvania more challenging – July 10, 2022
Pa.’s most traveled ‘structurally deficient’ bridge? Report reveals answer, where Keystone State ranks in bridges needing repair – March 28, 2022
Tick and mosquito threat expected to be high in Pa. this spring – March 23, 2022
Fastest growing cities in Pennsylvania – March 8, 2022
This Pa. city is named the top ‘Allergy Capital’ of the U.S. for 2022 – March 3, 2022
Pa. releases final rule to cut methane leaks from existing oil and gas well sites – December 10, 2021
Proposed School to Be Steps Away from Dangerous Pipelines – December 6, 2021
Climate change: an energy imbalance we are already feeling the effects of in Pennsylvania | Climate Smart Part 3 – November 30, 2021
Quarry planned in Bradford County, Pa.: Why are some residents pushing back? – September 29, 2021
Airport Corridor census data shows growth for local communities as business moves in – September 24, 2021
Wet, hot and hazy: How climate change helped shape summer 2021 in the Poconos – September 23, 2021
Exhibition traces a 200-year history of water pollution in Philadelphia – September 11, 2021
Single-use plastics ban cleared for Pa. cities as Pittsburgh moves to eliminate plastic bags – July 1, 2021
Pennsylvania beekeepers lost about 41% of their colonies last winter, report says – July 13, 2021
A thousand little cuts: Locals say a fire on Neville Island shows the pollution didn’t stop after Shenango Coke Works closed – June 23, 2021
Early warning issued for 269 bird species in trouble, many in Pa. – June 22, 2021
Poll shows Pennsylvanians support climate action amid pandemic – June 22, 2021
Increasing rain, aging infrastructure lead growing number of municipalities to adopt stormwater fees – April 2, 2021
Farmland acreage falls in Pa. while population rises in prime agricultural areas – March 29, 2021
Evidence of Fracking Chemicals Found in Bodies of Pennsylvania Children – March 23, 2021
Microplastics found in waterways across PA, including 7 in Allegheny County. Why it’s dangerous and what you should know. – March 10, 2021