ZIP Code 98320 — Brinnon CDP, WA Demographics & Data

ZIP code 98320 covers Brinnon, WA in Jefferson County with a population of about 1,313.

At a glance, the area shows median age of 59.6 versus a U.S. median of about 38.9.

It sits in telephone area codes 360, 564; U.S. House district WA-6; the SEATTLE - TACOMA media market.

Brinnon, WA reads as a military / base-oriented community on US5’s intent model (elevated veteran share (19.2%) and/or base-related place names). Service members and families often look up Basic Allowance for Housing (BAH) rates, on-base mail (PSC / P.O. Box) addresses, and nearby ZIP demographics when relocating.

US5 shows 2026 DoD BAH locality rates for this ZIP’s Military Housing Area on this page (pay grade × with/without dependents). Treat the table as a planning reference and confirm entitlement with your finance office or the official DTMO BAH lookup.

Median household income in ZIP 98320 is about $53,000 — about 29% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 16.0%; unemployment rate near 8.3%; 19.7% of adults with a bachelor’s degree or higher (about 14.0 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Retail trade, Education, and Agriculture; about 6.2% of workers reporting work-from-home (about 9.0 points below the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $265,500 — about 24% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $835 (about 28% below the U.S. median rent ($1,163)), and owner-occupancy near 83.8% (about 18.4 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 98320 in Brinnon, WA, a household would need roughly $73,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $1,706. That is about 38% above the local median household income ($53,000), so the median earner would likely stretch or need a larger down payment. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

FEMA’s National Risk Index rates natural-hazard risk for Brinnon CDP, WA as Relatively Low (composite score 64.4), which is near the middle of the national distribution. The strongest component scores on US5 are flood (53.7) and wildfire (23.5). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for Brinnon CDP, WA show little to no average snow.

IRS migration statistics show a net inflow of about 71 for ZIP 98320 (Brinnon CDP, WA) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.