Granite County, MT Property Tax Rate
Homeowners in Granite County pay an effective 0.61% of home value in property tax — about $2,071 a year on the median $339,500 home, below or near the Montana county median of 0.71%.
Granite County, MT: 0.61% effective property tax — ~$2,071/yr on the median home.
- Effective rate0.61%
- Median home value$339,500
- Median annual bill$2,071
- MT county median0.71%
- U.S. county median0.84%
Source: U.S. Census ACS 2023 5-year (median taxes paid ÷ median value), compiled June 2026.
Granite County vs. Montana and the U.S.
| Effective rate | On the county's $339,500 median home | |
|---|---|---|
| Granite County | 0.61% | $2,071 |
| Montana county median | 0.71% | $2,410 |
| U.S. county median | 0.84% | $2,852 |
Median household income here is $54,646, putting the median tax bill at about 3.8% of income. Effective rates fold in homestead exemptions and assessment practice — they're what owners actually pay, which is why they beat statutory rates for comparison.
Highest & lowest rates in Montana
| County | Effective rate | Median bill |
|---|---|---|
| Blaine County | 1.52% | $1,898 |
| Roosevelt County | 1.29% | $1,540 |
| Sheridan County | 1.29% | $1,440 |
| Dawson County | 1.17% | $2,193 |
| Madison County | 0.41% | $1,806 |
| Carter County | 0.44% | $777 |
| Judith Basin County | 0.45% | $964 |
| Sweet Grass County | 0.49% | $1,448 |
Full picture: Montana property tax calculator · interactive county atlas · all county pages.
Frequently asked questions
What is the property tax rate in Granite County, MT?
The effective rate is about 0.61% of home value — the median homeowner pays roughly $2,071 a year on a $339,500 median home (ACS 2023 five-year data).
Is Granite County's property tax high?
It's below or near the Montana county median (0.71%) and below the U.S. county median (0.84%).
How is the effective rate calculated?
Median real-estate taxes paid ÷ median home value, from the Census American Community Survey — what owners actually pay, after exemptions, rather than the statutory millage.
Sources & methodology
Sources: Census ACS 2023 5-year tables B25103/B25077.
Effective rate = median real-estate taxes ÷ median home value (owner-occupied). Individual bills vary with exemptions, assessment timing and local levies — verify with the county assessor.