| City: | Olympia, Washington |
| Names to Avoid: | Washington State Department |
| County: | Thurston County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 12:07:52 AM |
| Population: | No Population Data |
| Area Codes: | 360 / 564 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 47.0442, -122.9007 |
| Quick Link: |
The Washington State Capitol complex, home to the state's legislative and executive branches, operates under dedicated ZIP code 98504 in downtown Olympia, Thurston County. The centerpiece Legislative Building was completed in 1928 after construction began in 1922, featuring a masonry dome that was the fourth-tallest in the world at completion. The campus was placed on the National Register of Historic Districts in 1974. This postal designation has served state government for over two decades.
Located in Olympia's Downtown neighborhood, approximately 45 miles from Seattle, postal records identify 17 delivery codes routing state government correspondence. Census Business Patterns data shows 16 establishments employing 150 workers at this location. The Legislative Building has withstood three major earthquakes, including the 2001 Nisqually earthquake, thanks to excellent structural design. A $120 million rehabilitation completed in 2004 added modern systems while preserving historic features. Olympia is the valid mailing city for this ZIP code.
| Establishments: | 16 |
| Employment: | 150 |
ZIP Code 98504 supports both business and residential activity. According to the Business Census (2024), there are 17 business establishments, employing about 167 people with an annual payroll of $15,627,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 7,508Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 17Source: CBP |
| 1st Quarter Payroll: | $4,269,000Source: CBP |
| Annual Payroll: | $15,627,000Source: CBP |
| # of Employees: | 167Source: CBP |
ZIP Code 98504 is located in Thurston County, Washington, within the Olympia-Lacey-Tumwater, WA Metropolitan Statistical Area (CBSA 36500) and Washington's 10th Congressional District. This Metro area has a population of 296,640 people, about 0.00% of whom live in ZIP Code 98504. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Olympia-Lacey-Tumwater, WASource: Census |
| CBSA Number: | 36500Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 296,640Source: Census |
| MSA: | Seattle-Tacoma-Bremerton, WA CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 10Source: USPS |
| Congressional Land Area: | 826.67 sq miSource: Census |
| PMSA: | Olympia, WA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 5351300Source: Census |
| Place Name: | Olympia city; WashingtonSource: Census |
We could not locate which school district 98504 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.