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Welcome to Plainfield ...

The city of Plainfield is located in Bremer County<1>.

While we don't have a date for the founding of Plainfield, you might consider that their post office opened in 1868.

When the people of Plainfield refer to themselves (known as a demonym), they frequently use Plainfielder<2>

From the  Census Estimates for 2019, Plainfield has a population of 414 people<3> (see below for details).

Plainfield is 940 feet [287 m] above sea level.<4>.

Time Zone: Plainfield lies in the Central Time Zone (CST/CDT) and observes daylight saving time

Area Code for Plainfield: 319

The ZIP code for Plainfield: 50666<5>

Population Details ...

Taken from the 2019 Census Estimates, Plainfield had an population of 414 people. This is a decrease of 5.05% since the 2010 Census (or a decrease of 5.48% since the 2000 Census).

At the time of the 2010 Census, Plainfield had a population of 436 people. This makes Plainfield the county's 7th most populous community.

The population of Plainfield represents 0.01% of the population of Iowa (which has 3,046,355 people), making it the state's 490th most populous community.

With a 2010 count of 436 people, the population of Plainfield has remained roughly the same as the 2000 Census (which had a count of 438 people).

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

Communities Also Named Plainfield ...

Using our Gazetteer, we found that there are 27 communities that are also named Plainfield - they are located in Arkansas, California, Connecticut, Florida, Georgia, Illinois (2), Indiana (2), Kansas, Maryland, Massachusetts (3), Michigan, Missouri, New Hampshire, New Jersey, Nova Scotia, Ohio, Ontario, Pennsylvania (2), Tennessee, Vermont, West Virginia and Wisconsin.

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

Communities near Plainfield ...

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

  • Waverly
    (8 miles [12.9 km] to the south)
  • Charles City
    (16 miles [25.7 km] to the northwest)
  • New Hampton
    (18 miles [29 km] to the northeast)
  • Denver
    (15 miles [24.1 km] to the southeast)
  • Nashua
    (7 miles [11.3 km] to the north)
    • Nashua is located in Chickasaw County
    • Jump to our Gazetteer entry for Nashua
    • Population from the 2020 Census: 1,571 people
    • Jump to TripAdvisor's Tourism page for Nashua <6>
  • Tripoli
    (14 miles [22.5 km] to the east)
  • Clarksville
    (7 miles [11.3 km] to the southwest)
  • Shell Rock
    (9 miles [14.5 km] to the south)
  • Greene
    (13 miles [20.9 km] to the west)
  • Janesville
    (14 miles [22.5 km] to the south)

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

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

We also have a detailed list of newspapers that have been published in the area around Plainfield. See our Newspapers Page for Plainfield.

TripAdvisor Tourism Pages for Plainfield ...

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

Adding Plainfield to Our Gazetteer ...

We originally found mention of Plainfield 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 (so far) for Plainfield was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<7>

From that list, the Plainfield post office opened in 1868.

For more details, see References and Mentions for Plainfield.

Footnotes ...

<1>If you're interested in how the shape of Iowa's counties, including Bremer, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>A demonym is the name for a resident of a community which is usually derived from (or is related to) the name of that community. In other words, it's how the residents of Plainfield refer to themselves. It's important to note that there aren't any rules for taking a city's name and turning it into a demonym. A demonym is informal and while the majority of Plainfield may use one name, keep in mind that others may use something different.
<3>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Plainfield.
<4>The elevation is an estimate for the area around Plainfield - 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 Plainfield). When looking for a ZIP Code, whether Plainfield 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>A copy of the Blevins & Helbock Post Office list with background information can be found at:

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