Property Tax in Whatcom County, Washington

What the Whatcom County numbers mean

Read the two medians together: $3,819 is the middle tax bill among owner-occupied households in Whatcom County, and $536,100 is the middle home value. Neither figure describes a specific property — together they describe the typical homeowner's situation in the county.

The derived effective rate for Whatcom County is 0.71% (median tax ÷ median value). Treat it as an estimate for comparison only: it comes from survey medians of different households, not from the county's rate schedule.

The key figures for Whatcom County

For context, the Washington medians are $4,361 of tax on $519,800 of value, and the US medians are $2,969 on $303,400. *Derived figures are estimates from Census medians, not official rates.

Whatcom County at a glance

• Median tax rank in Washington: #9 of 39 counties
• Median home value rank in Washington: #4 of 39
• Population rank in Washington: #9 of 39 (228,432 residents)
• Population density rank: #10 of 39 (108 people per square mile)
• Land area rank in Washington: #12 of 39 (2,107 sq mi, 3.2% of the combined county land area)
• Median tax as a monthly figure: $318; per $1,000 of home value: $0.71

How Whatcom County compares

Set against its state, Whatcom County's median bill of $3,819 is about 12% lower than the Washington median ($4,361). Against the country as a whole it is about 29% higher than the US median ($2,969). That places the county #9 of 39 Washington counties ranked by median taxes paid.

Remember what drives the ranking: bills follow home values as much as rates. Whatcom County's median home, at $536,100, ranks #4 by value in Washington, while its derived rate of 0.71% compares with a derived US figure of 0.98%.

Some extra context for Whatcom County: the median bill works out to about $318 a month, and the derived rate equals roughly $712 of tax per $100,000 of home value. The county is home to 228,432 people — the #9 most populous county in Washington, spread over 2,107 square miles, a density of about 108 people per square mile. Its median home value, $536,100, ranks #4 among the state's 39 counties with data.

Nationally, Whatcom County's median bill of $3,819 ranks #257 of 3133 counties with published data — inside the top 8% of counties by tax paid. The county accounts for about 3.0% of Washington's population, its median home value is about 3% above the state median, and at the derived rate the median home would hand over roughly 7.12% of its value in tax across a decade. Within the state, the distance from Whatcom County to the most expensive county, King County ($6,785), is $2,966 a year.

Counties nearest Whatcom County in the Washington ranking

Whatcom County and its population peers

Population is a useful lens on these figures, so the table below sets Whatcom County beside the counties closest to it in population anywhere in the country — communities of a similar scale operating under different state and local tax systems. Ranked by median tax paid within this peer group of 9, Whatcom County's $3,819 bill is #2 of 9.

The closest population match is Jefferson County, Missouri (228,227 residents), where the median real estate tax paid is $1,835 on a median home value of $218,800 — $1,984 more than Whatcom County pays.

Inside Washington itself, the counties closest to Whatcom County in population are Kitsap County (276,581 residents, median tax $4,030 on a median value of $505,700); Yakima County (256,605 residents, median tax $2,299 on a median value of $281,100); Benton County (210,224 residents, median tax $2,910 on a median value of $369,400); Skagit County (130,407 residents, median tax $4,008 on a median value of $486,200). Same state, same broad tax framework — yet the median bills still differ, because assessed values and the mix of county, municipal and school-district rates are set locally.

How the tax is worked out

Think of the final bill as three ingredients: the assessed value of the property, the exemptions subtracted from it, and the combined rate of every district the property sits in. Whatcom County's medians imply a derived rate of 0.71%; applied illustratively, a $400,000 home would owe about $2,848 a year, or around $237 a month spread evenly. Individual properties depart from the illustration in both directions.

Illustrative bills in Whatcom County at the derived rate

The derived rate of 0.71% is only an estimate built from medians, but applying it to different home values gives a sense of scale for Whatcom County — and a quick way to compare with the state derived rate of 0.84% and the US figure of 0.98%:

Illustration only: real bills are computed from the assessed value, exemptions, and the combined rates of the property's actual taxing districts.

Checking your assessment in Whatcom County

If your bill looks wrong, work through these steps:

1. Get your property record card from the assessor and check the basics — living area, lot size, bedrooms, condition, and any exemptions you should have.
2. Compare your assessed value with recent sale prices of similar homes in Whatcom County.
3. Talk to the assessor's office informally first; clear errors are often fixed without a hearing.
4. If needed, file a formal appeal with the local review board before the deadline on your assessment notice, with your evidence attached.
5. Keep paying the bill as issued while the appeal runs, unless your notice says otherwise — unpaid taxes accrue penalties regardless of an appeal.

More Washington counties

• Benton County, WA — $2,910
• Yakima County, WA — $2,299
• Kitsap County, WA — $4,030
• Thurston County, WA — $4,043
• Skagit County, WA — $4,008
• Cowlitz County, WA — $2,988

Frequently asked questions