| City: | Tacoma, Washington |
| City Alias: | Joint Base Lewis Mcchord, Lewis Mcchord, Madigan Hosp, Madigan Hospital |
| Names to Avoid: | Jb Lewis Mcchord, Jblm, Madigan Army Medical Center |
| County: | Pierce County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 10:16:50 AM |
| Population: | No Population Data |
| Area Code: | 253 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 47.1095, -122.5470 |
| Quick Link: |
Madigan Army Medical Center, the Army's second-largest medical facility and one of only three Army Level II trauma centers, operates under dedicated ZIP code 98431 at Joint Base Lewis-McChord in Pierce County, Washington. Named on September 22, 1944 for Colonel Patrick Madigan, known as the Father of Army Neuropsychiatry, the hospital opened that year as a temporary facility for war wounded. The 1.2-million-square-foot, nine-story building maintains approximately 220 beds and handles nearly one million outpatient visits annually, serving more than 100,000 active duty service members, families, and retirees. This postal designation has served the hospital for over two decades.
Located approximately 35 miles from Seattle in the Fort Lewis area, postal records show three delivery codes routing mail to Madigan Army Medical Center on Reid Street. Census Business Patterns data indicates 10 establishments employing 3,103 workers, reflecting the hospital's substantial medical workforce. Valid mailing cities for this ZIP include Tacoma, Madigan Hospital, Joint Base Lewis McChord, and Lewis McChord.
| Establishments: | 10 |
| Employment: | 3,103 |
| Residential: | 0 |
| Business: | 1 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 98431 supports both business and residential activity. According to the Business Census (2024), there are 7 business establishments, employing about 3,071 people with an annual payroll of $298,816,000. USPS data shows 0 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 1Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 7Source: CBP |
| 1st Quarter Payroll: | $74,832,000Source: CBP |
| Annual Payroll: | $298,816,000Source: CBP |
| # of Employees: | 3,071Source: CBP |
ZIP Code 98431 is located in Pierce County, Washington, within the Seattle-Tacoma-Bellevue, WA Metropolitan Statistical Area (CBSA 42660) and Washington's 10th Congressional District. This Metro area has a population of 3,439,809 people, about 0.00% of whom live in ZIP Code 98431, and is subdivided into the Tacoma-Lakewood, WA division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Seattle-Tacoma-Bellevue, WASource: Census |
| CBSA Number: | 42660Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Tacoma-Lakewood, WA (CBSA Div 45104)Source: Census |
| CBSA Population: | 3,439,809Source: 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: | Tacoma, WA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 5370000Source: Census |
| Place Name: | Tacoma city; WashingtonSource: Census |
We could not locate which school district 98431 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.