Lewis and Clark County property tax, in one number.
The typical Lewis and Clark County homeowner pays $3,113 a year on a $393,500 home. That's above the Montana rate (0.72%) and below the U.S. rate (0.94%).
Estimate my taxLewis and Clark County at a glance
Five numbers that shape a typical property tax bill here.
Property tax calculator
Enter a home value to see a typical yearly bill at Lewis and Clark County's average effective rate, or pick another area.
- Bills are up, rates are down.The median tax paid rose from $2,053 in 2015 to $3,546 in 2024 (+73%), while home values rose 111%. That pushed the effective rate down.
- 19th highest rate in Montana.Out of 56 Montana counties with full data. Nationally, the rate is higher than in 49% of U.S. counties.
- Mortgage holders pay more.Homes with a mortgage paid a median $3,202, versus $2,967 for homes owned outright, often because they're newer, higher-value or more recently reassessed.
The data, charted
Median tax paid & effective rate
Owners vs renters
Effective rate by city
Largest Montana counties
| County | Median tax | Rate |
|---|---|---|
| Missoula County | $4,150 | 0.88% |
| Yellowstone County | $2,832 | 0.81% |
| Lewis and Clark County | $3,113 | 0.79% |
| Gallatin County | $3,933 | 0.59% |
| Flathead County | $3,120 | 0.58% |
| Montana | $2,693 | 0.72% |
Compare neighboring counties
Effective property tax rates in and around Lewis and Clark County.
Cities and towns in Lewis and Clark County
Places with at least 2,000 owner-occupied homes and reliable survey data.
- Helena0.92% · $3,552
- Helena Valley Southeast0.72% · $2,380
- Helena Valley West Central0.76% · $2,779
Good to know
What is the property tax rate in Lewis and Clark County?
The effective rate is about 0.79%. The median homeowner pays $3,113 a year on a home worth a median $393,500 (ACS 2020–2024). The legal tax rates set by each taxing unit are different numbers; the effective rate is what owners actually pay as a share of value.
How much is property tax on a $400,000 home in Lewis and Clark County?
About $3,160 a year, or roughly $263 a month, at Lewis and Clark County's average effective rate of 0.79%. Homestead, senior, veteran or other exemptions can lower the real bill, and a recent purchase or reassessment can raise it.
Why is my bill different from this estimate?
Your bill depends on your home's assessed value from the county assessor, the exact taxing units where you live (county, city, school district, special districts) and any exemptions you get. These figures are medians across all owner-occupied homes, not a bill for any address.
How current is this data?
It comes from the U.S. Census Bureau's American Community Survey 5-year estimates for 2020–2024, the latest release. Homeowners report the taxes they paid, so the numbers lag current bills by one to two years. We update the site when the Census Bureau publishes new estimates each December.
More: all Montana counties · U.S. county rankings · calculator for any county