This is unchanged from the previous estimate.
Bucks County had the fourth largest population in Pennsylvania in 2021.
The US Census Bureau found more than 73 percent of counties in the US saw a natural decrease in population in 2021. This is up from a 55.5 percent increase in 2020.
The Midwest suffered the most sustained population decreases, with many counties along the US East Coast and through the Rocky Mountains seeing increases.
The US population continues to grow, though at a slower rate than before.
Pennsylvania Counties By Population Change from 2020 to 2021
| County | 2020 Estimated Population | 2021 Estimated Population | % Change in Population From Year to Year |
|---|---|---|---|
| Pike County | 58,591 | 59,952 | 2.3% |
| Forest County | 6,952 | 7,032 | 1.2% |
| Cumberland County | 259,996 | 262,919 | 1.1% |
| Carbon County | 64,751 | 65,412 | 1% |
| Chester County | 534,645 | 538,649 | 0.7% |
| Wayne County | 51,101 | 51,431 | 0.6% |
| Monroe County | 168,248 | 169,273 | 0.6% |
| Sullivan County | 5,838 | 5,868 | 0.5% |
| York County | 456,389 | 458,696 | 0.5% |
| Montgomery County | 856,947 | 860,578 | 0.4% |
| Perry County | 45,821 | 45,986 | 0.4% |
| Schuylkill County | 142,777 | 143,264 | 0.3% |
| Adams County | 103,795 | 104,127 | 0.3% |
| Columbia County | 64,667 | 64,872 | 0.3% |
| Clinton County | 37,350 | 37,465 | 0.3% |
| Luzerne County | 325,057 | 326,053 | 0.3% |
| Dauphin County | 286,544 | 287,400 | 0.3% |
| Lehigh County | 374,504 | 375,539 | 0.3% |
| Franklin County | 155,874 | 156,289 | 0.3% |
| Northampton County | 312,855 | 313,628 | 0.2% |
| Butler County | 193,851 | 194,273 | 0.2% |
| Lancaster County | 552,597 | 553,652 | 0.2% |
| Lebanon County | 143,242 | 143,493 | 0.2% |
| Berks County | 428,694 | 429,342 | 0.2% |
| Washington County | 209,157 | 209,470 | 0.1% |
| Mifflin County | 46,073 | 46,136 | 0.1% |
| Wyoming County | 26,001 | 26,034 | 0.1% |
| Susquehanna County | 38,354 | 38,389 | 0.1% |
| Lackawanna County | 215,516 | 215,663 | 0.1% |
| Bradford County | 59,858 | 59,892 | 0.1% |
| Bucks County | 646,008 | 646,098 | 0% |
| Clarion County | 37,178 | 37,156 | -0.1% |
| Tioga County | 40,969 | 40,929 | -0.1% |
| Bedford County | 47,523 | 47,461 | -0.1% |
| Union County | 42,625 | 42,568 | -0.1% |
| Montour County | 18,115 | 18,087 | -0.2% |
| Fulton County | 14,549 | 14,523 | -0.2% |
| Northumberland County | 91,471 | 91,266 | -0.2% |
| Snyder County | 39,717 | 39,621 | -0.2% |
| Centre County | 157,929 | 157,527 | -0.3% |
| Westmoreland County | 353,998 | 353,057 | -0.3% |
| Indiana County | 83,116 | 82,886 | -0.3% |
| Huntingdon County | 44,030 | 43,889 | -0.3% |
| Mercer County | 110,333 | 109,972 | -0.3% |
| Lycoming County | 113,980 | 113,605 | -0.3% |
| Clearfield County | 80,394 | 80,082 | -0.4% |
| Somerset County | 73,917 | 73,627 | -0.4% |
| Lawrence County | 85,865 | 85,497 | -0.4% |
| Delaware County | 576,388 | 573,849 | -0.4% |
| Crawford County | 83,723 | 83,351 | -0.4% |
| Elk County | 30,927 | 30,783 | -0.5% |
| Erie County | 270,427 | 269,011 | -0.5% |
| Armstrong County | 65,445 | 65,093 | -0.5% |
| Potter County | 16,356 | 16,259 | -0.6% |
| Cambria County | 132,957 | 132,167 | -0.6% |
| Blair County | 122,518 | 121,767 | -0.6% |
| Juniata County | 23,451 | 23,297 | -0.7% |
| Beaver County | 167,732 | 166,624 | -0.7% |
| Venango County | 50,275 | 49,938 | -0.7% |
| Jefferson County | 44,431 | 44,114 | -0.7% |
| Allegheny County | 1,248,717 | 1,238,090 | -0.9% |
| Warren County | 38,480 | 38,134 | -0.9% |
| McKean County | 40,306 | 39,941 | -0.9% |
| Fayette County | 128,393 | 126,931 | -1.1% |
| Greene County | 35,813 | 35,369 | -1.2% |
| Cameron County | 4,519 | 4,459 | -1.3% |
| Philadelphia County | 1,601,005 | 1,576,251 | -1.5% |
ORGANIZATIONS IN THIS STORY
Plumsteadville• Newtown Grant• Borough of Langhorne• Upper Southampton Township• Village Shires• Borough of Sellersville• Milford Square• Fairless Hills• Woodside• Borough of Chalfont• Nockamixon• Borough of Doylestown• Brittany Farms-The Highlands• Bensalem• Borough of Langhorne Manor• Hilltown• Bristol Borough• Borough of Yardley• Churchville• Cornwells Heights• Borough of Richlandtown• Croydon• Borough of Hulmeville• Bedminster• Feasterville• Spinnerstown• Bridgeton• Haycock• Falls• Lower Makefield• Borough of Tullytown• Eddington• Borough of New Hope• Borough of Ivyland• Bristol Township• Borough of Riegelsville• Borough of Penndel• Borough Of New Britain• Upper Makefield• Wrightstown• Trevose• Woodbourne• Levittown• Borough Of Trumbauersville• Warminster Heights• Borough Of Silverdale• Lower Southampton• Borough Of Perkasie• Richboro• Borough Of Quakertown• Solebury
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