Area Code 564
Washington
Area code 564 serves Washington, primarily Seattle, in the Pacific Time (PT) time zone. It is an overlay area code sharing territory with area code 206.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 206 (Seattle).
In service since: 28-Aug-2017
Demographics & Economics
- Total Population
- 1,054,706
- Population Density
- 1,056 people/sq miabove U.S. average (U.S.: 93 people/sq mi)
- Median Household Income
- $122,148above U.S. median (U.S.: $75,144)
- Poverty Rate
- 8.4%below U.S. average (U.S.: 11.5%)
- Unemployment Rate
- 4.6%above U.S. average (U.S.: 3.6%)
- Education Attainment
- Bachelor's Degree+55.5%above U.S. average (U.S.: 33.7%)High School or Lower17.6%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the Statistics dashboard.
Time Zone
- Pacific Time (PT)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
WA
Major Cities
- Seattle
- Vancouver
- Everett
- Bellingham
- Marysville
- South Hill
- Shoreline
- Lacey
- Olympia
- Burien
- Bremerton
- Edmonds
- Longview
- Mount Vernon
- Graham
- Des Moines
- SeaTac
- Orchards
- Camas
- Tumwater
- Mercer Island
- Bainbridge Island
- Oak Harbor
- Hazel Dell
and 273 more cities
Demographics
The estimated population served by area code 564 is approximately 1,054,706. The population density is 1,056 people per square mile, which is higher than the national average of 93. The median household income is $122,148, which is higher than the national median of $75,144. Approximately 55.5% of adults hold a bachelor's degree or higher, compared to the national rate of 33.7%. This rate is higher than the national average. The poverty rate stands at 8.4%, which is lower than the national rate of 11.5%.
History
Area code 564 serves as an overlay for the same territory as area code 206. It was introduced in 2017 to provide additional phone number capacity for the region. It shares its territory with area code area code 206.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 564).
| County | Population | Share |
|---|---|---|
| Clark, WA | 526,280 | 19.0% |
| Thurston, WA | 325,020 | 11.7% |
| Snohomish, WA | 299,694 | 10.8% |
| Kitsap, WA | 259,328 | 9.3% |
| Whatcom, WA | 258,563 | 9.3% |
| Skagit, WA | 195,327 | 7.0% |
| Mason, WA | 161,818 | 5.8% |
| Cowlitz, WA | 118,437 | 4.3% |
| Lewis, WA | 103,526 | 3.7% |
| Grays Harbor, WA | 92,588 | 3.3% |
| Island, WA | 86,747 | 3.1% |
| Clallam, WA | 78,880 | 2.8% |
| Jefferson, WA | 68,777 | 2.5% |
| Wahkiakum, WA | 56,730 | 2.0% |
| Pierce, WA | 46,953 | 1.7% |
| San Juan, WA | 40,960 | 1.5% |
| Skamania, WA | 23,669 | 0.9% |
| Pacific, WA | 22,500 | 0.8% |
| King, WA | 10,299 | 0.4% |
Area Code 564 Family Tree
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Area code 564 was originally assigned in 28-Aug-2017 to serve WA.
Call Context
This area code covers a geographic region across WA, including Seattle and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 564.
Other Area Codes in Washington
Area codes that also serve Washington, linked for easy comparison.