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Welcome to Mount Joy ...

Mount Joy is located in Lancaster County<1>.

While we don't have a date for the founding of Mount Joy, you might consider that their post office opened  in 1818.

A typical abbreviation for Mount Joy: Mt. Joy

From the  Census Estimates for 2019, Mount Joy has a population of 8,282 people<2> (see below for details).

Mount Joy is 370 feet [113 m] above sea level.<3>.

Time Zone: Mount Joy lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time

Area Codes for Mount Joy: 717 & 223<4>

The ZIP code for Mount Joy: 17552<5>

Population Details ...

Taken from the 2019 Census Estimates, Mount Joy had an population of 8,282 people. This is an increase of 11.77% since the 2010 Census (or an increase of 22.42% since the 2000 Census).

At the time of the 2010 Census, Mount Joy had a population of 7,410 people. This makes Mount Joy the county's 7th most populous community.

The population of Mount Joy represents 0.06% of the population of Pennsylvania (which has 12,702,379 people), making it the state's 112nd most populous community.

With a 2010 count of 7,410 people, the population of Mount Joy increased 9.53% from the 2000 Census (with a count of 6,765 people).

More information can be found on the Census Page for Mount Joy.

Communities Also Named Mount Joy ...

While we believe that this Mount Joy is located in Lancaster County, we know of another 2 Pennsylvania communities named Mount Joy. Those communities are located in the following counties: Clearfield and Westmoreland County.

Beyond Pennsylvania, there are 10 communities that are also named Mount Joy - they are located in Delaware, Iowa, New Jersey, Ohio, Ontario, South Carolina, Tennessee and Texas.

For more information, see our Tidbits & Trivia Page for Mount Joy.

Communities near Mount Joy ...

We have created a list of 10 communities that are near Mount Joy.

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Mount Joy. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Mount Joy.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Mount Joy. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Mount Joy.

We also have a detailed list of newspapers that have been published in the area around Mount Joy. Our list includes 12 papers. See our Newspapers Page for Mount Joy.

TripAdvisor Tourism Pages for Mount Joy ...

Looking for more information about Mount Joy? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

In addition to the Tourism page for Mount Joy, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Mount Joy.

Adding Mount Joy to Our Gazetteer ...

We originally found mention of Mount Joy in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found for Mount Joy was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<8>

X2X - From that list, the Mount Joy post office opened in 1818.

We also found Mount Joy in the book titled U.S. Post Offices (Oct. 1846).

For more details, see References and Mentions for Mount Joy.

Unfortunately, we don't know of a website for Mount Joy. If you can help, please contact us through our Feedback Page.

The official website for Lancaster County: www.co.lancaster.pa.us/

The official website for Commonwealth of Pennsylvania: https://www.pa.gov/

Footnotes ...

<1>If you're interested in how the shape of Pennsylvania's counties, including Lancaster, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Mount Joy.
<3>The elevation is an estimate for the area around Mount Joy - it will be higher in some places and lower in others.
<4>When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 717 code has been Overlayed with the 223 area code. New phone numbers in the Mount Joy area will be assigned with one of these codes: 717 or 223. As a result, placing a call in the Mount Joy area will require 10-digit dialing (where you enter both the area code and then the phone number).
<5>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a community (such as Mount Joy). When looking for a ZIP Code, whether Mount Joy or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<6>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<7>The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required.
<8>A copy of their list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/




 

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This page was last modified/updated: 29 Apr 2025