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County tax profile · 2026 · Census ACS + IRS data

Property Tax & Income in King William County, Virginia

King William County has an effective property tax rate of 0.55%. On the median home value of $315,700, that's roughly $1,729 per year. Median household income is $86,056.

Effective Property Tax Rate1
0.55%
median tax $1,729 ÷ median home $315,700
Median Home Value1
$315,700
owner-occupied
Median Household Income1
$86,056
per-capita $39,260
Est. Annual Tax on Median Home1
$1,729
at 0.55% effective rate

What you'll pay, at a glance

Property taxes are the largest local tax most homeowners pay. The effective rate measures the real tax bill as a share of home value — a more useful number than the nominal “mill rate,” because assessment practices vary county to county.

MetricKing William CountyVirginia (state context)
Effective property tax rate10.55%0.60%
Median home value1$315,700—
State income tax3top rate 5.75%top rate 5.75%
State sales tax35.77% combined5.77% combined

How this is calculated

The effective property tax rate is the median real-estate tax bill divided by the median home value — both for owner-occupied homes, from the U.S. Census Bureau's American Community Survey (ACS 5-year estimates)1. Median income is also from the ACS1. Federal and state income-tax figures use IRS2 and Tax Foundation3 data.

About King William County, VA

Buying a home in King William County, Virginia means weighing a median value of $315,700 against an annual tax bill of about $1,729, based on an effective rate of 0.548%. That rate sits below Virginia's statewide median of 0.601% and well under the national figure of 0.794%, so property taxes here take a smaller bite than in many other places. Households earning a median of $86,056 would devote roughly two percent of that income to real-estate taxes. The county ranks 90th of 133 Virginia counties for its rate. Aylett, King William, and Manquin anchor the area, with Aylett among the larger communities. Per-capita income stands at $39,260, so buyers should compare their own budget against both the purchase price and the ongoing tax obligation before committing.

Frequently asked questions

What is the property tax rate in King William County, VA?
The effective rate is 0.55% — meaning the median tax bill equals about 0.55% of the median home value.
How much are property taxes on a median home?
On the median home ($315,700), the estimated annual bill is about $1,729.
Is King William County's rate high or low?
Compare it to the state median of 0.60% and the national average near 1.1%.
How does the effective rate differ from my mill rate?
A mill rate is the nominal levy per $1,000 of assessed value. The effective rate reflects what you actually pay after exemptions and assessments — it's the median tax bill as a share of median home value, so it better predicts your real cost.
Will a reassessment raise my tax bill?
Not necessarily. If your home's assessed value rises, your bill can go up, but only if the mill rate and exemptions stay flat. Contact the King William County assessor's office to review your current assessment.
Can I appeal my property tax assessment?
Yes. Most counties allow an appeal when you believe the assessed value exceeds the market value. File with the King William County assessor within the local deadline, typically with comparable sales as evidence.
Sources
[1] U.S. Census Bureau — ACS 5-Year (2023) — Median home value (B25077), median real-estate taxes (B25103), median household income (B19013), per-capita income (B19301).
[2] IRS — Statistics of Income — County income, AGI, and real-estate taxes paid.
[3] Tax Foundation — State income, sales, corporate, and estate/inheritance tax rates.