Boundary County, ID Property Tax: $1,433/yr (2026)
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The effective property tax rate in Boundary County is 0.42% of assessed home value. On a home at the county median value of $344,100, that works out to about $1,445 per year, or $120 per month. Boundary County is located in northwestern Idaho, with Bonners Ferry as its county seat, and is home to approximately 12,695 residents.
About Boundary County
Boundary County covers approximately 1,268.7 square miles in Idaho. The county is home to about 12,695 residents living in roughly 5,535 housing units, of which 68.1% are owner-occupied. The median household income is $62,438, and the median home was built in 1990.
The county seat is Bonners Ferry. Boundary County borders Bonner County, Lincoln County, Pend Oreille County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Idaho
Property taxes in Idaho are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Idaho offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Boundary County Assessor's office to learn which exemptions apply to your property and when to file.
Boundary County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Boundary County, ID | 0.42% | $344,100 | $1,445 |
| Idaho state average | 0.51% | — | $1,755* |
| Bonner County | 0.40% | $433,400 | $1,716 |
| Lincoln County | 0.58% | $258,700 | $1,499 |
| Pend Oreille County | 0.67% | $307,800 | $2,048 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Boundary County's median home value of $344,100. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Boundary County's property tax rate compare to the rest of Idaho?
At 0.42%, Boundary County is lower than the Idaho state average of 0.51%. On a home at the county median of $344,100, that means about $1,445 per year — versus $1,755 at the state average rate, a difference of $310 per year. Compared to the national average of 1.10%, Boundary County is below average.
What's a typical annual property tax bill in Boundary County?
For a home at the county median value of $344,100, the annual property tax in Boundary County is approximately $1,445 — or about $120 per month. For a home worth $516,150, expect around $2,168 per year. For a $688,200 home, approximately $2,890 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Boundary County property tax assessment?
Property assessment appeals in Boundary County are handled by the Boundary County Assessor's office in Bonners Ferry. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Boundary County?
Idaho counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 0.42% shown here. Contact the Boundary County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File