This is less than a one percent rise in Montgomery County’s population, from 856,947 in 2020 to 860,578 in 2021.
Montgomery County had the third 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
Wyncote• Gilbertsville• Willow Grove• Skippack• King of Prussia• Montgomeryville• Collegeville• Salford• Stowe• Upper Hanover• Borough of Souderton• Wyndmoor• Borough of Bridgeport• Spring Mount• Trooper• Oreland• Plymouth Meeting• Whitemarsh Township• Upper Moreland• Jenkintown Borough• Pottsgrove• Worcester• Halfway House• New Hanover• Upper Merion Township• Perkiomen• Borough of Royersford• Borough of Hatboro• Skippack Township• City of Lansdale• West Pottsgrove• Borough of Conshohocken• Lower Moreland• Woxhall• Narberth Borough• Sanatoga• Whitpain• Borough of Pottstown• Borough of Schwenksville• Spring House• Borough of West Conshohocken• Borough of Norristown• Horsham• Limerick Township• Glenside• Borough of Red Hill• Borough of North Wales• Kulpsville• Arcadia University Cdp• Evansburg• Penn Wynne• Blue Bell• Borough of Pennsburg• Borough Of Trappe• Borough Of Rockledge• Cheltenham• Flourtown• Maple Glen• Borough Of East Greenville• West Norriton• Borough Of Hatfield• Upper Gwynedd• Lower Merion• Bryn Mawr• Upper Salford• Horsham Township• Borough Of Bryn Athyn• Harleysville• Borough Of Green Lane• Audubon• Fort Washington• Borough Of Ambler
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