County · North Dakota
Slope County, North Dakota
Slope County, North Dakota. Slope County had 628 residents in 2025 by the Census Bureau's estimate, down 10.4% since 2020, while North Dakota grew 2.6%. It holds 20 places (2 cities, villages and boroughs and 18 towns and townships) and 1 census tract. GEOID 38087.
Residents, July 2025 estimate
628
Census Bureau estimate (no margin published)
2020 Census count: 706 · ACS 2020-2024: 766 ±83
Median household income
$71,250
±$16,084 (90% margin)
North Dakota: $76,657
Median home value
$170,000
±$98,191 (90% margin)
North Dakota: $249,900
Median gross rent
$525
±$336 (90% margin)
North Dakota: $954
How many people live in Slope County, and is it growing?
The 2020 Census counted 706 residents in Slope County. The Census Bureau estimates 628 for July 1, 2025, down 10.4% since 2020, while North Dakota grew 2.6%. The 2020-2024 American Community Survey puts the population at 766 over 1,215 square miles of land.
| Measure | Slope County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Total population | 766±83 | 784,841 | no clear change |
| Households | 374±39 | 331,063 | no clear change |
| Average household size | 2.05±0.20 | 2.28 | no clear change |
| Housing units | 456±40 | 377,281 | no clear change |
Slope County's population since 2000
From 767 in 2000 to 628 in 2025: down 18.1%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Slope County?
Slope County holds 20 places: 2 cities, villages and boroughs (incorporated places) and 18 towns and townships (county subdivisions with their own government). The largest is Marmarth with 91 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| MarmarthGEOID 3850860 | 101 | $62,813 |
|---|---|---|
| Woodberry TownshipGEOID 3808787340 | 44 | not published |
| Rainy Butte TownshipGEOID 3808765060 | 43 | $166,250 |
| Cash TownshipGEOID 3808712620 | 39 | $93,333 |
| Sand Creek TownshipGEOID 3808770420 | 35 | $75,417 |
| Peaceful Valley TownshipGEOID 3808761260 | 33 | not published |
| Connor TownshipGEOID 3808715740 | 29 | not published |
| Hume TownshipGEOID 3808739420 | 28 | not published |
| Crawford TownshipGEOID 3808716620 | 27 | not published |
| Mineral Springs TownshipGEOID 3808753100 | 27 | not published |
| AmidonGEOID 3802060 | 24 | not published |
| Carroll TownshipGEOID 3808712420 | 21 | not published |
| Sheets TownshipGEOID 3808772100 | 19 | not published |
| Cedar Creek TownshipGEOID 3808713140 | 16 | $172,727 |
| Moord TownshipGEOID 3808754140 | 14 | not published |
| Mound TownshipGEOID 3808754700 | 11 | not published |
| White Lake TownshipGEOID 3808785620 | 10 | not published |
| Richland Center TownshipGEOID 3808766620 | 10 | not published |
| Bucklin TownshipGEOID 3808710220 | 5 | not published |
| Hughes TownshipGEOID 3808739300 | 5 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Slope County?
The median resident of Slope County is 54.1 years old; 15.9% are under 18 and 28.7% are 65 or older. The largest group is non-Hispanic white residents at 92.4%, then non-Hispanic residents of two or more races at 6.7%.
| Measure | Slope County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median age | 54.1±3.4 | 35.9 | +6.4 |
| Under 18 years | 15.9%±4.8 pts | 23.5% | – |
| 65 years and over | 28.7%±5.7 pts | 16.5% | – |
| Hispanic or Latino (any race) | 0.1%±0.3 pts | 4.7% | – |
| White alone, not Hispanic | 92.4%±4.2 pts | 81.7% | no clear change |
| Black or African American alone, not Hispanic | 0.0%±3.2 pts | 3.3% | – |
| Asian alone, not Hispanic | 0.0%±3.2 pts | 1.6% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±3.2 pts | 4.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±3.2 pts | 0.1% | – |
| Two or more races, not Hispanic | 6.7%±4.2 pts | 4.0% | – |
| Some other race alone, not Hispanic | 0.8%±1.0 pts | 0.3% | – |
| Born outside the United States | 0.5%±0.6 pts | 4.7% | – |
| Speak a language other than English at home (age 5+) | 2.8%±2.1 pts | 6.7% | – |
| Civilian veterans (age 18+) | 5.6%±2.8 pts | 7.1% | – |
| With a disability | 15.3%±3.7 pts | 12.0% | – |
| No health insurance coverage | 4.4%±2.3 pts | 6.5% | – |
| High school graduate or higher (age 25+) | 93.0%±2.8 pts | 94.0% | – |
| Bachelor's degree or higher (age 25+) | 29.3%±6.9 pts | 32.7% | no clear change |
| Graduate or professional degree (age 25+) | 4.2%±2.1 pts | 9.7% | – |
| Moved from another state in the past year | 4.8%±2.9 pts | 4.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Slope County earn?
Half of Slope County's 374 households earn less than $71,250 a year (±$16,084), against $76,657 in North Dakota. In 2015-2019 it was $78,286 in 2024 dollars; the margins of error cannot tell the two periods apart. 5.0% of residents live below the poverty line.
| Measure | Slope County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $71,250±$16,084 | $76,657 | no clear change |
| Mean household income | $92,091±$14,287 | $101,793 | – |
| Per capita income | $47,169±$6,322 | $43,389 | no clear change |
| People below the poverty line | 5.0%±3.0 pts | 10.8% | no clear change |
| Children under 18 below the poverty line | 0.0%±18.4 pts | 11.1% | – |
| Households receiving SNAP | 2.4%±2.2 pts | 6.6% | – |
| Households with a broadband subscription | 78.1%±8.3 pts | 88.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Slope County?
Owners occupy 80.7% of Slope County's occupied homes and renters 19.3%. The median owner-occupied home is valued at $170,000 by its owner (±$98,191). The median renter pays $525 a month including utilities.
| Measure | Slope County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $170,000±$98,191 | $249,900 | no clear change |
| Median gross rent | $525±$336 | $954 | no clear change |
| Renters paying 35% or more of income on rent | 17.9%±25.2 pts | 31.1% | – |
| Median monthly owner costs, with a mortgage | $2,224±$236 | $1,762 | – |
| Owner-occupied homes | 80.7%±8.5 pts | 62.9% | no clear change |
| Housing units | 456±40 | 377,281 | no clear change |
| Homeowner vacancy rate | 0.0%±7.9 pts | 1.2% | – |
| Rental vacancy rate | 0.0%±28.6 pts | 8.3% | – |
| Single-family detached homes | 87.7%±4.8 pts | 56.7% | – |
| Mobile homes | 9.6%±4.3 pts | 6.6% | – |
| Built 2020 or later | 0.0%±5.3 pts | 1.8% | – |
| Built 1939 or earlier | 27.6%±7.5 pts | 11.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Slope County building?
Builders took permits for 0 new housing units across Slope County in 2025 (0 single-family), 0.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Slope County get to work?
60.5% of Slope County's workers drive alone and 9.3% work from home. The average trip to work takes 21.0 minutes.
| Measure | Slope County | North Dakota | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 61.8%±7.0 pts | 68.6% | – |
| Unemployment rate | 2.7%±2.2 pts | 2.8% | – |
| Drove alone to work | 60.5%±10.2 pts | 77.9% | – |
| Carpooled | 10.0%±5.5 pts | 8.8% | – |
| Public transportation | 0.0%±6.1 pts | 0.3% | – |
| Walked | 20.3%±13.6 pts | 3.2% | – |
| Worked from home | 9.3%±5.0 pts | 8.1% | −18.2 pts |
| Mean travel time to work | 21.0 min±5.7 | 17.9 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Slope County's census tracts?
Slope County is a single census tract.
| Tract 965038087965000 | 766±83 | $71,250 |
|---|
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Slope County compare with North Dakota's other counties?
| Measure | Rank |
|---|---|
| Population | 53rd of 53 |
| Growth 2020-2025 | 53rd of 53 |
| Residents per square mile | 53rd of 53 |
| Median household income | 29th of 53 |
| Median home value | 22nd of 53 |
| Median gross rent | 50th of 53 |
| Poverty rate | 53rd of 53 |
| Bachelor's degree or higher | 12th of 53 |
| Median age | 1st of 53 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Slope County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.