County · code 38059
Morton CountyNorth Dakota
Morton County is in North Dakota, with its seat in Mandan. The county was founded in 1873 and named after Oliver P. Morton.
- Founded1873
- County seatMandan
- Named forOliver P. Morton
- Land area1,926 sq mi + 19 sq mi water
- Population33,291 2020 Census
- Parcels mapped24,665 checked 15 October 2026
Where it is
Morton on the map of North Dakota
North Dakota has 53 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1873
An old deed may name a county that no longer exists, or a boundary that has since moved.
Morton gained territory from Hettinger and Stark Counties on February 18, 1887, and became a county in the state of North Dakota on November 2, 1889. On November 7, 1916, Morton lost territory to the creation of Grant County.
- 1887Gained territory Morton gained from Hettinger and Stark. · Dak. Terr. Laws 1887, 17th sess., ch. 183/p. 380
- 1889Became part of North Dakota Morton became a county in the state of North Dakota. · U.S. Stat., vol. 25, ch. 180[1889]/pp. 676-684 and vol. 26, no. 5/pp. 1548-1549; Swindler, 7:526-527; Van Zandt, 134
- 1891Changed Legislature authorized Morton to gain part of Non-County Area 9, dependent on local referendum. Vote was 370 to 83 against the gain (no change). · N. Dak. Laws 1891, 2d sess., ch. 50, secs. 6-11/pp. 130-132; HRS N. Dak., Williams, 3-5; Hall, 226-229
- 1897Changed Legislature authorized Morton to gain all of Non-County Area 9; gain did not take effect (no change). · N. Dak. Laws 1897, 5th sess., ch. 79/p. 122; Hall, 233
- 1916
Land and parcels
What the maps cover in Morton
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 24,665 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 9 October 2026 · checked 15 October 2026 -
Address points Official
One point per address, 15,797 in all from State of North Dakota — NDGISHUB / ND Department of Emergency Services (owner NDGISHDP-DES).
edited 12 October 2026 · checked 13 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Morton by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Morton County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Morton County.
See your own lot on these maps
Open Morton County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Morton County
- When was Morton County founded?
- Morton County was founded in 1873, and named after Oliver P. Morton.
- What is the county seat of Morton County?
- The county seat of Morton County is Mandan.
- Is there an online parcel map for Morton County?
- Yes. A public source publishes a parcel map of 24,665 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Morton County's boundary or name changed?
- Atlas of Historical County Boundaries records 5 changes for Morton County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Grant County, Hettinger County and Stark County.
- Is my lot in a flood zone?
- We do not have flood maps for Morton County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby