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A Gazetteer for the United States and Canada
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Welcome to Mill Plain ...

Mill Plain is located in Clark County<1>.

While we don't have a date for the founding of Mill Plain, you might consider that their post office opened in 1876.

A typical abbreviation for Mill Plain: Mill Pln.

Mill Plain is 270 feet [82 m] above sea level.<2>.

Time Zone: Mill Plain lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time

Area Codes for Mill Plain: 360 & 564<3>

Communities Also Named Mill Plain ...

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

Communities near Mill Plain ...

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

  • Portland
    (12 miles [19.3 km] to the southwest)
    • Portland is located in Multnomah County (OR)
    • Jump to our Gazetteer entry for Portland
    • Population from the 2020 Census: 656,751 people
    • Jump to TripAdvisor's Tourism page for Portland <4>
  • Vancouver
    (8 miles [12.9 km] to the west)
  • Gresham
    (9 miles [14.5 km] to the south)
    • Gresham is located in Multnomah County (OR)
    • Jump to our Gazetteer entry for Gresham
    • Population from the 2020 Census: 110,031 people
    • Jump to TripAdvisor's Tourism page for Gresham <4>
  • Beaverton
    (19 miles [30.6 km] to the southwest)
    • Beaverton is located in Washington County (OR)
    • Jump to our Gazetteer entry for Beaverton
    • Population from the 2020 Census: 98,957 people
    • Jump to TripAdvisor's Tourism page for Beaverton <4>
  • Lake Oswego
    (18 miles [29 km] to the southwest)
  • Camas
    (5 miles [8 km] to the southeast)
  • Happy Valley
    (13 miles [20.9 km] to the south)
  • Battle Ground
    (9 miles [14.5 km] to the north)
  • Milwaukie
    (15 miles [24.1 km] to the southwest)
    • Milwaukie is located in Multnomah County (OR)
    • Jump to our Gazetteer entry for Milwaukie
    • Population from the 2020 Census: 21,046 people
    • Jump to TripAdvisor's Tourism page for Milwaukie <4>
  • Troutdale
    (8 miles [12.9 km] to the southeast)
    • Troutdale is located in Multnomah County (OR)
    • Jump to our Gazetteer entry for Troutdale
    • Population from the 2020 Census: 16,403 people
    • Jump to TripAdvisor's Tourism page for Troutdale <4>

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

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

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

TripAdvisor Tourism Pages for Mill Plain ...

Looking for more information about Mill Plain? 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.

While we are unaware of a Tourism page that is specific to Mill Plain, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Mill Plain.

Adding Mill Plain to Our Gazetteer ...

We originally found mention of Mill Plain 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 Mill Plain was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<5>

From that list, the Mill Plain post office opened in 1876. The Mill Plain post office closed in 1878.

For more details, see References and Mentions for Mill Plain.

Footnotes ...

<1>If you're interested in how the shape of Washington's counties, including Clark, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Mill Plain - it will be higher in some places and lower in others.
<3>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 360 code has been Overlayed with the 564 area code. New phone numbers in the Mill Plain area will be assigned with one of these codes: 360 or 564. As a result, placing a call in the Mill Plain area will require 10-digit dialing (where you enter both the area code and then the phone number).
<4>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<5>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/