Township · Pennsylvania
Mount Joy Township, Adams County, Pennsylvania
Mount Joy Township, Adams County, township, in Adams County, Pennsylvania. Mount Joy Township, Adams County had 3,881 residents on July 1, 2025 by the Census Bureau's estimate, up 2.6% since 2020; the 2020 Census counted 3,789 and the ACS 2020-2024 5-year estimates put it at 3,830 (±15). GEOID 4200151640.
Residents, July 2025 estimate
3,881
Census Bureau estimate (no margin published)
2020 Census count: 3,789 · ACS 2020-2024: 3,830 ±15
Median household income
$93,917
±$17,087 (90% margin)
Pennsylvania: $77,971
Median home value
$345,000
±$30,256 (90% margin)
Pennsylvania: $254,500
Median gross rent
$1,341
±$440 (90% margin)
Pennsylvania: $1,209
Where is Mount Joy Township, Adams County and what county is it in?
Mount Joy Township, Adams County is a township in Adams County, Pennsylvania. It covers 26.0 square miles of land, 146 residents per square mile in 2020.
One place lies inside Mount Joy Township (Adams County): Lake Heritage (CDP, 2,158 in 2020).
Mount Joy Township, Adams County is in the Gettysburg, PA metropolitan statistical area (Census Bureau delineation, July 2023).
Mount Joy Township, Adams County is the same area as Census Tract 312.01 of Adams County: the tract's figures are Mount Joy Township, Adams County's own.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Mount Joy Township, Adams County, and is it growing?
The Census Bureau estimates that 3,881 people lived in Mount Joy Township, Adams County on July 1, 2025, up 2.6% since 2020, faster than Pennsylvania (+0.4%). The 2020 Census counted 3,789 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 3,830 (±15).
| Measure | Mount Joy Township, Adams County | Adams County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,830±15 | 106,115 | +102 |
| Households | 1,435±124 | 40,841 | no clear change |
| Average household size | 2.64±0.23 | 2.49 | no clear change |
| Housing units | 1,556±128 | 43,672 | no clear change |
Mount Joy Township, Adams County's population since 2000
From 3,232 in 2000 to 3,881 in 2025: up 20.1%. The 2000, 2010 and 2020 figures are census counts, each for Mount Joy Township, Adams County as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Mount Joy Township, Adams County?
The median resident of Mount Joy Township, Adams County is 44.8 years old; 21.9% are under 18 and 23.9% are 65 or older. The largest group is non-Hispanic white residents at 85.3%, then Hispanic or Latino residents (of any race) at 9.1%.
| Measure | Mount Joy Township, Adams County | Adams County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 44.8±6.2 | 43.7 | no clear change |
| Under 18 years | 21.9%±3.6 pts | 19.4% | – |
| 65 years and over | 23.9%±3.6 pts | 21.8% | – |
| Male | 50.0%±3.9 pts | 49.8% | – |
| Hispanic or Latino (any race) | 9.1%±7.1 pts | 7.7% | – |
| White alone, not Hispanic | 85.3%±7.6 pts | 86.8% | no clear change |
| Black or African American alone, not Hispanic | 1.4%±1.9 pts | 1.6% | – |
| Asian alone, not Hispanic | 2.0%±3.2 pts | 0.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.8 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.8 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.3%±1.2 pts | 2.5% | – |
| Some other race alone, not Hispanic | 0.9%±1.1 pts | 0.4% | – |
| Born outside the United States | 3.9%±3.1 pts | 3.7% | – |
| Speak a language other than English at home (age 5+) | 9.9%±6.8 pts | 6.7% | – |
| Civilian veterans (age 18+) | 11.2%±3.8 pts | 7.9% | – |
| With a disability | 15.1%±4.1 pts | 13.8% | – |
| No health insurance coverage | 3.8%±2.7 pts | 6.0% | – |
| High school graduate or higher (age 25+) | 94.4%±2.8 pts | 91.4% | – |
| Bachelor's degree or higher (age 25+) | 38.0%±6.8 pts | 25.8% | no clear change |
| Graduate or professional degree (age 25+) | 15.2%±4.4 pts | 10.9% | – |
| Lived in the same house a year earlier | 89.7%±5.3 pts | 90.2% | – |
| Moved from another state in the past year | 0.8%±0.8 pts | 2.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Mount Joy Township, Adams County earn?
Half of Mount Joy Township, Adams County's 1,435 households earn less than $93,917 a year (±$17,087), against $84,092 in Adams County and $77,971 in Pennsylvania. In 2015-2019 it was $101,332 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.0% of residents live below the poverty line.
| Measure | Mount Joy Township, Adams County | Adams County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $93,917±$17,087 | $84,092 | no clear change |
| Mean household income | $129,469±$21,063 | $102,363 | – |
| Per capita income | $48,280±$7,188 | $40,973 | no clear change |
| People below the poverty line | 8.0%±4.9 pts | 8.2% | – |
| Children under 18 below the poverty line | 11.6%±8.5 pts | 12.6% | – |
| Households receiving SNAP | 2.4%±2.0 pts | 8.2% | – |
| Households with a computer | 97.3%±3.0 pts | 94.3% | – |
| Households with a broadband subscription | 90.8%±4.9 pts | 90.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Mount Joy Township, Adams County?
Owners occupy 85.8% of Mount Joy Township, Adams County's occupied homes and renters 14.2%. The median owner-occupied home is valued at $345,000 by its owner (±$30,256). The median renter pays $1,341 a month including utilities.
| Measure | Mount Joy Township, Adams County | Adams County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $345,000±$30,256 | $268,500 | no clear change |
| Median gross rent | $1,341±$440 | $1,115 | no clear change |
| Renters paying 35% or more of income on rent | 41.4%±27.4 pts | 32.5% | – |
| Median monthly owner costs, with a mortgage | $2,011±$239 | $1,780 | – |
| Owner-occupied homes | 85.8%±7.1 pts | 78.9% | no clear change |
| Renter-occupied homes | 14.2%±7.1 pts | 21.1% | – |
| Housing units | 1,556±128 | 43,672 | no clear change |
| Homeowner vacancy rate | 0.7%±1.1 pts | 0.7% | – |
| Rental vacancy rate | 0.0%±14.7 pts | 4.1% | – |
| Single-family detached homes | 94.3%±4.3 pts | 74.7% | – |
| Mobile homes | 2.7%±2.3 pts | 5.5% | – |
| Built 2020 or later | 1.2%±1.3 pts | 1.3% | – |
| Built 2010 to 2019 | 3.9%±1.9 pts | 7.2% | – |
| Built 1939 or earlier | 12.3%±5.3 pts | 17.5% | – |
| Households with no vehicle | 1.0%±1.3 pts | 4.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Mount Joy Township, Adams County work and get to work?
74.3% of Mount Joy Township, Adams County's workers drive alone and 12.0% work from home. The average trip to work takes 29.2 minutes.
| Measure | Mount Joy Township, Adams County | Adams County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.7%±4.8 pts | 63.7% | – |
| Unemployment rate | 1.4%±1.4 pts | 3.4% | – |
| Drove alone to work | 74.3%±6.7 pts | 76.3% | – |
| Carpooled | 10.3%±6.2 pts | 7.2% | – |
| Public transportation | 0.0%±1.6 pts | 0.2% | – |
| Walked | 3.3%±3.9 pts | 3.4% | – |
| Worked from home | 12.0%±4.6 pts | 11.7% | +6.3 pts |
| Mean travel time to work | 29.2 min±4.9 | 28.2 min | −8.3 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Mount Joy Township, Adams County?
1 census tract lies mostly in Mount Joy Township, Adams County (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 312.01Adams County | 3,830 | $93,917 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Mount Joy Township, Adams County) · Census block assignment files
How does Mount Joy Township, Adams County compare with other places in Pennsylvania?
By the Census Bureau's July 2025 estimates, Mount Joy Township, Adams County is the 2,875th-most populous of the 16,079 U.S. towns and townships that have one and the 472nd-most populous of 1,542 in Pennsylvania.
Mount Joy Township, Adams County ranks 551st of 2,136 places in Pennsylvania with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 472nd | 1,542 |
| Growth 2020-2025 (PEP) | 319th | 1,764 |
| Residents per square mile | 1,527th | 2,159 |
| Median household income | 551st | 2,136 |
| Per capita income | 506th | 2,157 |
| Median home value | 352nd | 2,146 |
| Median gross rent | 484th | 1,963 |
| Poverty rate | 955th | 1,606 |
| Bachelor's degree or higher | 490th | 2,129 |
| Median age | 963rd | 2,157 |
| Owner-occupied share | 739th | 2,149 |
| Work from home | 899th | 1,710 |
| Travel time to work | 548th | 2,156 |
Mount Joy Township, Adams County's figures with every place in Pennsylvania (CSV)
Every place in Pennsylvania, sortable · Compare Mount Joy Township, Adams County with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Mount Joy Township, Adams County?
22 of the 57 figures for Mount Joy Township, Adams County on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Mount Joy Township, Adams County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.