Morton County, ND Property Tax: $2,562/yr (2026)
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The effective property tax rate in Morton County is 1.03% of assessed home value. On a home at the county median value of $249,600, that works out to about $2,571 per year, or $214 per month. Morton County is located in central North Dakota, with Mandan as its county seat, and is home to approximately 33,479 residents.
About Morton County
Morton County covers approximately 1,925.9 square miles in North Dakota. The county is home to about 33,479 residents living in roughly 15,334 housing units, of which 66.2% are owner-occupied. The median household income is $79,483, and the median home was built in 1979.
The county seat is Mandan. Morton County borders Burleigh County, Emmons County, Grant County, Mercer County, Oliver 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 Morton County Assessor's office to learn which exemptions apply to your property and when to file.
Morton County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Morton County, ND | 1.03% | $249,600 | $2,571 |
| North Dakota state average | 0.89% | — | $2,221* |
| Burleigh County | 0.88% | $314,700 | $2,764 |
| Emmons County | 0.90% | $112,400 | $1,011 |
| Grant County | 0.98% | $85,800 | $841 |
| Mercer County | 1.07% | $196,200 | $2,101 |
| Oliver County | 0.63% | $217,000 | $1,363 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Morton County's median home value of $249,600. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Morton County's property tax rate compare to the rest of North Dakota?
At 1.03%, Morton County is higher than the North Dakota state average of 0.89%. On a home at the county median of $249,600, that means about $2,571 per year — versus $2,221 at the state average rate, a difference of $350 per year. Compared to the national average of 1.10%, Morton County is below average.
What's a typical annual property tax bill in Morton County?
For a home at the county median value of $249,600, the annual property tax in Morton County is approximately $2,571 — or about $214 per month. For a home worth $374,400, expect around $3,856 per year. For a $499,200 home, approximately $5,142 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Morton County property tax assessment?
Property assessment appeals in Morton County are handled by the Morton County Assessor's office in Mandan. 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 Morton 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 1.03% shown here. Contact the Morton 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