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Welcome to Mason ...

The city of Mason is located in Warren County<1>.

The pronunciation of Mason: MAY-suhn<2>

While we don't have a date for the founding of Mason, you might consider that their post office opened  in 1851.

From the  Census Estimates for 2019, Mason has a population of 34,007 people<3> (see below for details).

Mason is 790 feet [241 m] above sea level.<4>.

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

The ZIP code for Mason: 45040<5>

Websites for Mason ...

Official Website:

Population Details ...

Taken from the 2019 Census Estimates, Mason had an population of 34,007 people. This is an increase of 10.73% since the 2010 Census (or an increase of 54.46% since the 2000 Census).

At the time of the 2010 Census, Mason had a population of 30,712 people (or 14.44% of the total population of Warren County). This makes Mason the county's most populous community.

The population of Mason represents 0.27% of the population of Ohio (which has 11,536,504 people), making it the state's 44th most populous community.

With a 2010 count of 30,712 people, the population of Mason increased 39.5% from the 2000 Census (with a count of 22,016 people).

More information can be found on the Census Page for Mason.

Communities Also Named Mason ...

Using our Gazetteer, we found that there are 38 communities that are also named Mason - they are located in Alabama, Arkansas, California (2), Florida, Georgia, Idaho, Illinois (2), Indiana, Kansas, Kentucky (2), Louisiana (2), Michigan (3), Minnesota, Missouri, Montana (2), Nebraska, Nevada, New Hampshire, North Dakota, Oklahoma, Oregon, Pennsylvania, Tennessee, Texas (2), Virginia (2), Washington (2), West Virginia and Wisconsin.

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

Communities near Mason ...

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

  • Hamilton
    (13 miles [20.9 km] to the west)
  • Middletown
    (11 miles [17.7 km] to the northwest)
  • Fairfield
    (12 miles [19.3 km] to the west)
    • Note: The GPS coordinates that we are using for Fairfield have been provided by the GNIS.<7> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Fairfield
    • Fairfield is located in Hamilton County
    • Population from the 2020 Census: 42,603 people
    • Jump to a Google Map centered on Fairfield
    • Jump to TripAdvisor's Tourism page for Fairfield <6>
  • Lebanon
    (7 miles [11.3 km] to the northeast)
  • Miamisburg
    (19 miles [30.6 km] to the north)
  • Norwood
    (15 miles [24.1 km] to the southwest)
  • Springboro
    (14 miles [22.5 km] to the north)
    • Note: The GPS coordinates that we are using for Springboro have been provided by the GNIS.<7> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Springboro
    • Springboro is located in Warren County
    • Population from the 2020 Census: 19,235 people
    • Jump to a Google Map centered on Springboro
    • Jump to TripAdvisor's Tourism page for Springboro <6>
  • Forest Park
    (12 miles [19.3 km] to the southwest)
    • Note: The GPS coordinates that we are using for Forest Park have been provided by the GNIS.<7> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Forest Park
    • Forest Park is located in Hamilton County
    • Population from the 2020 Census: 18,534 people
    • Jump to a Google Map centered on Forest Park
    • Jump to TripAdvisor's Tourism page for Forest Park <6>
  • Monroe
    (6 miles [9.7 km] to the northwest)
  • Sharonville
    (8 miles [12.9 km] to the southwest)

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 Mason. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Mason.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Mason. 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 Mason.

We also have a detailed list of newspapers that have been published in the area around Mason. Our list includes 6 papers. See our Newspapers Page for Mason.

TripAdvisor Tourism Pages for Mason ...

Looking for more information about Mason? 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 Mason, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Mason.

Adding Mason to Our Gazetteer ...

We originally found mention of Mason 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 Mason was in the book titled Table of U.S. Post Offices in the United States (Jan. 1851).

We also found Mason in the book titled Business Atlas and Shippers' Guide (1895).

For more details, see References and Mentions for Mason.

The official website for Mason:

The official website for Warren County:

The official website for State of Ohio:

Footnotes ...

<1>If you're interested in how the shape of Ohio's counties, including Warren, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The pronunciation we've provided is our attempt to give a phonetic pronunciation for Mason. While it might not be exactly right, hopefully it will be close. If we have it wrong or there's a better way to pronounce the name, please contact us through our Feedback Page.
<3>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Mason.
<4>The elevation is an estimate for the area around Mason - it will be higher in some places and lower in others.
<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 city (such as Mason). When looking for a ZIP Code, whether Mason 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.


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This page was last modified/updated: 07 Dec 2023