Ada County, ID Property Taxes (2026)

Ada County owners pay a median of $2,643 a year on a median home value of $476,000, an effective rate of 0.56%. That's the 13th-highest rate of 44 Idaho counties with Census data, above the Idaho county median of 0.50%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

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Effective tax rate

0.56%

13th highest of 44 in ID

Median annual bill

$2,643

~$220/month

Median home value

$476,000

Idaho county median

0.50%

Effective rate

What a protest could save you in Ada County

Enter the market value from your appraisal notice. We apply Ada County's 0.56% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$2,666
Savings at 10–15% off
$267–$400
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Ada County vs. Idaho vs. U.S. property tax rates

Ada County0.56%
Idaho county median0.50%
U.S. county median0.84%

Key stat: Ada County's effective property tax rate is 0.56%, vs. 0.50% for the median Idaho county and 0.84% for the median U.S. county. It ranks 13th of 44 in Idaho. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in Ada County

  1. 1

    Review your assessment notice

    Check the assessed value from the Ada County Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The Ada County deadline is Within 60 days of notice. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the County Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $2,643 bill, 10–15% off is $264–$396 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in Idaho

Idaho homeowners may qualify for exemptions that reduce taxable value. Check with the Ada County Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in Ada County, Idaho?
The median effective property tax rate in Ada County is 0.56%: a median annual bill of $2,643 on a median home value of $476,000. That's the 13th-highest rate of 44 Idaho counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in Ada County?
The median Ada County property tax bill is $2,643 a year, about $220 a month, compared with a Idaho county median of $1,420.
What is the deadline to appeal property taxes in Ada County?
The deadline to appeal in Ada County is Within 60 days of notice. Missing it means waiting until the next assessment cycle.
Is Ada County a high property tax area?
Ada County's 0.56% effective rate is above the Idaho county median of 0.50% and below the U.S. county median of 0.84%. That's the 13th-highest rate of 44 Idaho counties with Census data.
Can TaxDrop help lower my Ada County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Canyon County

Rate: 0.57%

Median bill: $1,996

Elmore County

Rate: 0.60%

Median bill: $1,680

Gem County

Rate: 0.39%

Median bill: $1,443

Boise County

Rate: 0.37%

Median bill: $1,571

Payette County

Rate: 0.44%

Median bill: $1,353

Owyhee County

Rate: 0.48%

Median bill: $1,355

Camas County

Rate: 0.42%

Median bill: $1,050

Washington County

Rate: 0.53%

Median bill: $1,316

← All 44 Idaho counties

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