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Welcome to Sunnyside ...

The city of Sunnyside is located in Yakima County<1>.

While we don't have a date for the founding of Sunnyside, you might consider that their post office opened  in 1894.

From the  Census Estimates for 2019, Sunnyside has a population of 16,859 people<2> (see below for details).

Sunnyside is 740 feet [226 m] above sea level.<3>.

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

Sunnyside lies within the (509) area code.

The ZIP code for Sunnyside: 98944<4>

Websites for Sunnyside ...

Official Website:

Population Details ...

Taken from the 2019 Census Estimates, Sunnyside had an population of 16,859 people. This is an increase of 6.31% since the 2010 Census (or an increase of 21.24% since the 2000 Census).

At the time of the 2010 Census, Sunnyside had a population of 15,858 people (or 6.52% of the total population of Yakima County). This makes Sunnyside the county's 2nd most populous community.

The population of Sunnyside represents 0.24% of the total population of Washington (which has 6,724,540 people), making it the state's 62nd most populous community.

With a 2010 count of 15,858 people, the population of Sunnyside increased 14.05% from the 2000 Census (which had a count of 13,905 people).

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

Communities Also Named Sunnyside ...

While we believe that this Sunnyside is located in Yakima County, we know of another 3 Washington communities named Sunnyside. Those communities are located in the following counties: Clark, Snohomish and Whatcom County.

Beyond Washington, there are 106 communities that are also named Sunnyside - they are located in Alabama, Alaska, Alberta, Arizona, Arkansas (2), British Columbia (2), California (5), Colorado (4), Connecticut (2), Florida (6), Georgia (3), Idaho (2), Illinois (4), Indiana, Kansas (2), Kentucky, Maryland (4), Massachusetts, Michigan (3), Mississippi, Missouri, Montana, Nevada, New Brunswick, New Jersey, New Mexico, New York (4), Newfoundland and Labrador (3), North Carolina (7), North Dakota, Ohio, Ontario (3), Oregon (3), Pennsylvania (7), South Carolina (2), Tennessee (7), Texas (3), Utah, Virginia (3), West Virginia (3) and Wisconsin (2).

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

Communities near Sunnyside ...

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

  • Grandview
    (6 miles [9.7 km] to the southeast)
  • Toppenish
    (15 miles [24.1 km] to the west)
  • Prosser
    (13 miles [20.9 km] to the southeast)
  • Granger
    (9 miles [14.5 km] to the west)
  • Zillah
    (13 miles [20.9 km] to the northwest)
  • Mabton
    (7 miles [11.3 km] to the south)
  • Outlook
    (4 miles [6.4 km] to the west)
    • Jump to our Gazetteer entry for Outlook
    • Outlook is located in Yakima County
  • Satus
    (7 miles [11.3 km] to the southwest)
    • Note: The GPS coordinates that we are using for Satus have been provided by the GNIS.<6> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Satus
    • Satus is located in Yakima County
  • Byron
    (11 miles [17.7 km] to the southeast)
    • Jump to our Gazetteer entry for Byron
    • Byron is located in Yakima County
  • Buena
    (16 miles [25.7 km] to the northwest)

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

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

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

TripAdvisor Tourism Pages for Sunnyside ...

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

Adding Sunnyside to Our Gazetteer ...

We originally found mention of Sunnyside 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 Sunnyside was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<7>

From that list, the Sunnyside post office opened in 1894.

For more details, see References and Mentions for Sunnyside.

The official website for Sunnyside:

The official website for Yakima County:

The official website for State of Washington:

Footnotes ...

<1>If you're interested in how the shape of Washington's counties, including Yakima, 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 Sunnyside.
<3>The elevation is an estimate for the area around Sunnyside - it will be higher in some places and lower in others.
<4>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 Sunnyside). When looking for a ZIP Code, whether Sunnyside or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<5>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<6>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.
<7>A copy of their list with background information can be found at:


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This page was last modified/updated: 07 Apr 2024