Cass County, ND Property Tax: $3,449/yr (2026)
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The effective property tax rate in Cass County is 1.21% of assessed home value. On a home at the county median value of $284,700, that works out to about $3,445 per year, or $287 per month. Cass County is located in eastern North Dakota, and is home to approximately 189,286 residents.
About Cass County
Cass County covers approximately 1,764.9 square miles in North Dakota. The county is home to about 189,286 residents living in roughly 87,497 housing units, of which 48.5% are owner-occupied. The median household income is $75,023, and the median home was built in 1993.
Cass County borders Clay County, Norman County, Barnes County, Ransom County, Richland County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in North Dakota
Property taxes in North Dakota 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 North Dakota 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 Cass County Assessor's office to learn which exemptions apply to your property and when to file.
Cass County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Cass County, ND | 1.21% | $284,700 | $3,445 |
| North Dakota state average | 0.89% | — | $2,534* |
| Clay County | 1.11% | $256,000 | $2,854 |
| Norman County | 0.99% | $135,700 | $1,341 |
| Barnes County | 1.10% | $168,100 | $1,842 |
| Ransom County | 1.05% | $174,800 | $1,838 |
| Richland County | 1.13% | $177,600 | $2,015 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Cass County's median home value of $284,700. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Cass County's property tax rate compare to the rest of North Dakota?
At 1.21%, Cass County is higher than the North Dakota state average of 0.89%. On a home at the county median of $284,700, that means about $3,445 per year — versus $2,534 at the state average rate, a difference of $911 per year. Compared to the national average of 1.10%, Cass County is above average.
What's a typical annual property tax bill in Cass County?
For a home at the county median value of $284,700, the annual property tax in Cass County is approximately $3,445 — or about $287 per month. For a home worth $427,050, expect around $5,167 per year. For a $569,400 home, approximately $6,890 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Cass County property tax assessment?
Property assessment appeals in Cass County are handled by the Cass County Assessor's office. 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 Cass County?
North Dakota 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 1.21% shown here. Contact the Cass 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