Petroleum County, MT Property Taxes (2026)

Petroleum County owners pay a median of $1,261 a year on a median home value of $173,700, an effective rate of 0.73%. That's the 27th-highest rate of 56 Montana counties with Census data, above the Montana county median of 0.71%.

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

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Effective tax rate

0.73%

27th highest of 56 in MT

Median annual bill

$1,261

~$105/month

Median home value

$173,700

Montana county median

0.71%

Effective rate

What a protest could save you in Petroleum County

Enter the market value from your appraisal notice. We apply Petroleum County's 0.73% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$1,268
Savings at 10–15% off
$127–$190
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Petroleum County vs. Montana vs. U.S. property tax rates

Petroleum County0.73%
Montana county median0.71%
U.S. county median0.84%

Key stat: Petroleum County's effective property tax rate is 0.73%, vs. 0.71% for the median Montana county and 0.84% for the median U.S. county. It ranks 27th of 56 in Montana. 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 Petroleum County

  1. 1

    Review your assessment notice

    Check the assessed value from the Petroleum Department of Revenue. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The Petroleum County deadline is Within 30 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 Department of Revenue.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $1,261 bill, 10–15% off is $126–$189 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in Montana

Montana homeowners may qualify for exemptions that reduce taxable value. Check with the Petroleum Department of Revenue 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 Petroleum County, Montana?
The median effective property tax rate in Petroleum County is 0.73%: a median annual bill of $1,261 on a median home value of $173,700. That's the 27th-highest rate of 56 Montana 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 Petroleum County?
The median Petroleum County property tax bill is $1,261 a year, about $105 a month, compared with a Montana county median of $1,719.
What is the deadline to appeal property taxes in Petroleum County?
The deadline to appeal in Petroleum County is Within 30 days of notice. Missing it means waiting until the next assessment cycle.
Is Petroleum County a high property tax area?
Petroleum County's 0.73% effective rate is above the Montana county median of 0.71% and below the U.S. county median of 0.84%. That's the 27th-highest rate of 56 Montana counties with Census data.
Can TaxDrop help lower my Petroleum County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Musselshell County

Rate: 0.63%

Median bill: $1,383

Fergus County

Rate: 0.84%

Median bill: $1,709

Garfield County

Rate: 0.66%

Median bill: $1,169

Golden Valley County

Rate: 0.51%

Median bill: $1,038

Treasure County

Rate: 0.62%

Median bill: $1,326

Phillips County

Rate: 0.85%

Median bill: $1,484

Yellowstone County

Rate: 0.84%

Median bill: $2,669

Wheatland County

Rate: 0.65%

Median bill: $1,122

← All 56 Montana counties

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