Demographics

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Change in Total Population by Age, 2017-21

What does this measure?

The change in population of a geographic area broken down by selected age groups since 2007-11.

Why is this important?

Population measures provide insight on the changing size and face of communities, and an area's needs and assets. For example, areas with large or growing populations of seniors or children may face challenges in providing needed services and generating enough tax revenue to support those services.

How does our county compare?

TThe population of Lancaster County has been aging. The number of people between the ages of 60 and 84 increased 31% and the population aged 85 and older grew 21% between 2007-11 and 2017-21. By comparison, the population aged 40 to 59 declined by 6%, and there was only a slight increase of 9% among people 20 to 39. There has been no change in population among those under 20. Since 2007-11, people under age 20 have been the largest single age group in Lancaster County, with almost 145,000 people, followed by those between the ages of 20 and 39 and people between 40 and 59, with approximately 138,000 and 133,000 people in each group respectively.

One of the most dramatic age shifts in a particular locality has been in Chester County, where those aged 60 to 84 increased by 41% between 2007-11 and 2017-21. Lebanon and Cumberland counties had the largest growth in the under-20 category both at 7%. The City of Lancaster is one of the few localities to experience declines, specifically among those 85 or older, which declined 35%, and among those under 20, which declined by 15%.

Notes about the data

The multi-year figures are from the Census Bureau's American Community Survey. The bureau combined multiple years of responses to the survey to provide estimates for smaller geographic areas and increase the precision of its estimates. The survey provides data on characteristics of the population that used to be collected only during the decennial census. Data for this indicator are expected to be released in the fourth quarter.

Change in Total Population by Age, 2017-21
Under 2020 to 3940 to 5960 to 8485 or Older
Pennsylvania-4%5%-9%25%8%
Lancaster County0%9%-6%31%21%
Lancaster City-15%8%-3%12%-35%*
Lancaster County School Districts
School District of Lancaster-9%8%-7%27%-14%*
Cocalico School District1%10%-5%17%144%**
Columbia Borough School District-16%-6%-14%37%21%*
Conestoga Valley School District17%16%-8%0%44%*
Donegal School District1%-1%5%31%100%**
Eastern Lancaster County School District-6%0%-9%38%20%*
Elizabethtown Area School District-10%14%1%35%31%*
Ephrata Area School District9%7%-13%32%36%*
Hempfield School District-2%0%-10%54%45%*
Lampeter-Strasburg School District10%29%-12%37%-8%*
Manheim Central School District4%1%9%56%-46%***
Manheim Township School District3%35%8%15%39%
Penn Manor School District7%11%-8%29%7%*
Pequea Valley School District2%21%-7%26%-31%*
Solanco School District-2%4%-13%36%80%*
Warwick School District0%6%-8%32%6%
Lancaster County Boroughs
Adamstown borough57%*19%*65%*-4%*-45%***
Akron borough34%-15%*-13%44%-63%***
Christiana borough-30%*-10%*-8%*-11%*-16%***
Columbia borough-16%-6%-14%37%21%*
Denver township6%-21%0%25%48%***
East Petersburg borough-2%*-41%*9%*74%*211%***
Elizabethtown borough-17%5%4%29%-43%**
Ephrata borough15%5%-21%14%49%***
Lititz borough7%15%-5%-6%-17%*
Manheim borough30%*4%-17%*12%*-72%***
Marietta borough-17%*-2%-6%59%*-28%***
Millersville borough-29%*-4%25%*19%22%***
Mount Joy borough19%*-8%8%34%189%***
Mountville borough15%*0%*-12%*21%*327%***
New Holland borough5%*-23%*-0%*43%189%***
Quarryville borough57%-5%*-29%66%-72%***
Strasburg borough1%*21%*-23%*62%*8%***
Terre Hill borough36%*21%*-46%*-33%*93%***
Lancaster County Townships
Bart township4%-12%6%*30%*14%***
Brecknock township-8%11%4%29%*-18%***
Caernarvon township-4%22%-27%*21%-29%***
Clay township5%17%*-10%35%53%***
Colerain township19%-3%-4%12%47%***
Conestoga township-10%*-6%*-10%62%*41%***
Conoy township7%*-1%*-13%*77%*-14%***
Drumore township-20%11%*-4%80%-5%***
Earl township8%-13%3%7%19%*
East Cocalico township-14%35%-17%22%354%***
East Donegal township9%14%10%27%167%***
East Drumore township6%*-21%*2%*11%87%***
East Earl township-27%6%-21%*142%*-47%***
East Hempfield township-4%11%-7%51%17%*
East Lampeter township25%15%-6%-7%240%**
Eden township15%*26%-34%*3%213%***
Elizabeth township-1%-20%*-18%99%*-75%***
Ephrata township-2%15%-5%50%101%*
Fulton township32%28%*-21%-20%*-36%***
Lancaster township25%8%-17%59%15%*
Leacock township2%19%-19%*57%-57%***
Little Britain township-34%*-13%*8%*124%*524%***
Manheim township3%35%8%15%39%
Manor township26%15%-11%27%12%**
Martic township15%-8%*-13%32%-42%***
Mount Joy township-5%17%11%23%47%***
Paradise township12%39%*-13%7%*45%**
Penn township12%5%*13%59%-66%***
Pequea township16%82%*-19%25%19%***
Providence township-23%35%*-28%54%149%***
Rapho township-13%-3%18%68%41%***
Sadsbury township17%7%-20%8%34%***
Salisbury township-3%14%0%24%-43%***
Strasburg township27%*13%*-45%*64%*429%***
Upper Leacock township-2%2%3%10%39%***
Warwick township-2%7%-7%46%68%*
West Cocalico township8%-2%*-1%10%*24%***
West Donegal township-20%16%*-7%34%86%*
West Earl township23%42%-22%9%-15%**
West Hempfield township-0%1%-18%64%76%**
West Lampeter township4%31%3%33%-18%*
Berks County-3%7%-5%26%15%
Chester County-1%8%-4%41%17%
Cumberland County7%11%-1%27%30%
Dauphin County3%7%-7%34%10%
Lebanon County7%7%-6%25%24%
York County-1%6%-8%34%15%

Source: U.S. Census Bureau
Notes: Rate is percentage change from 2007-11. Multiyear results are from rolling American Community Survey. * Margin of error between 20% & 35% of estimate; ** margin of error between 35% & 50%; *** margin of error greater than 50%.




Total Population by Age, 2017-21
Under 2020 to 3940 to 5960 to 8485 or Older
Pennsylvania3,054,8993,307,7683,330,5342,957,104320,345
Lancaster County144,880138,213133,161119,88314,343
Lancaster City15,82920,04213,9687,726469*
Lancaster County School Districts
School District of Lancaster20,15424,74817,42712,3581,077*
Cocalico School District7,0415,9656,3924,342712**
Columbia Borough School District2,1962,7602,2232,609455*
Conestoga Valley School District10,7569,3517,8226,222953*
Donegal School District5,2386,0906,0284,273366**
Eastern Lancaster County School District9,1127,3377,5307,980868*
Elizabethtown Area School District7,4838,1918,1376,6381,534*
Ephrata Area School District9,2309,4067,8287,923728*
Hempfield School District10,98111,08912,78814,2071,631*
Lampeter-Strasburg School District6,4714,7035,8507,2381,019*
Manheim Central School District6,1465,6447,6607,233350***
Manheim Township School District10,0699,68411,52710,1241,845
Penn Manor School District11,35411,61010,8159,463739*
Pequea Valley School District8,2165,8374,6963,820205*
Solanco School District10,6397,1827,2337,100889*
Warwick School District8,2107,5488,3177,517886
Lancaster County Boroughs
Adamstown borough835*601*650*300*12***
Akron borough1,047864*1,0121,16247***
Christiana borough211*244*194*255*47***
Columbia borough2,1962,7602,2232,609455*
Denver township1,0519391,02968596***
East Petersburg borough1,034*847*1,474*1,089*137***
Elizabethtown borough2,9023,6702,5062,228268**
Ephrata borough3,6694,2092,8432,751295***
Lititz borough2,3422,5622,1721,989420*
Manheim borough1,419*1,5541,148*878*37***
Marietta borough533*722721684*34***
Millersville borough1,814*2,7801,584*1,302218***
Mount Joy borough1,963*2,0642,2831,707234***
Mountville borough621*676*726*844*128***
New Holland borough1,247*1,126*1,508*1,631231***
Quarryville borough955708*52363113***
Strasburg borough820*677*643*898*65***
Terre Hill borough309*328*170*208*27***
Lancaster County Townships
Bart township1,321666706*476*24***
Brecknock township2,1421,7542,1471,458*54***
Caernarvon township1,5081,139979*92184***
Clay township1,8191,601*1,5901,730101***
Colerain township1,45880282375047***
Conestoga township881*809*1,1561,008*52***
Conoy township767*758*1,132*661*31***
Drumore township884557*60049542***
Earl township2,2911,3921,2991,725426*
East Cocalico township2,6752,9002,6802,079486***
East Donegal township2,1442,6442,2971,44072***
East Drumore township1,064*767*926*776363***
East Earl township1,6151,5981,427*2,037*46***
East Hempfield township4,9555,8716,3277,987952*
East Lampeter township5,3064,9393,9373,075439**
Eden township892*603368*41425***
Elizabeth township1,074708*1,0661,130*15***
Ephrata township2,6952,7322,3832,280285*
Fulton township1,261745*619555*27***
Lancaster township4,4954,8723,6324,713608*
Leacock township2,1481,496822*1,11850***
Little Britain township1,099*765*1,119*1,027*131***
Manheim township10,0699,68411,52710,1241,845
Manor township5,6185,5875,1534,998347**
Martic township1,679928*1,67588172***
Mount Joy township2,7223,0622,9961,742150***
Paradise township1,9351,492*1,1001,038*84**
Penn township2,3972,008*2,7412,819130***
Pequea township1,3621,506*1,2471,27450***
Providence township1,7051,569*1,5491,976217***
Rapho township2,3302,0823,7713,536183***
Sadsbury township1,37382469458139***
Salisbury township4,1332,8492,7741,66471***
Strasburg township1,669*940*810*903*111***
Upper Leacock township2,8212,2612,1131,577158***
Warwick township4,7944,2785,0794,398451*
West Cocalico township2,5151,556*2,0461,278*122***
West Donegal township1,6901,361*2,2302,4491,111*
West Earl township2,6292,1511,7721,570356**
West Hempfield township4,3713,6954,2614,287414**
West Lampeter township3,8122,9204,2245,356843*
Berks County108,756104,906112,24890,99310,064
Chester County136,198125,888146,688112,44310,487
Cumberland County60,88965,91067,36356,0347,137
Dauphin County70,54573,13872,37462,2735,869
Lebanon County36,25833,26935,29133,6823,986
York County111,845110,556120,313102,1039,788

Source: U.S. Census Bureau
Notes: Multiyear results are from rolling American Community Survey. * Margin of error between 20% & 35% of estimate; ** margin of error between 35% & 50%; *** margin of error greater than 50%.




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