City · Minnesota
Oslo, Minnesota
Oslo, city, in Marshall County, Minnesota. Oslo had 239 residents on July 1, 2025 by the Census Bureau's estimate, down 0.4% since 2020; the 2020 Census counted 239 and the ACS 2020-2024 5-year estimates put it at 260 (±57). GEOID 2748976.
Residents, July 2025 estimate
239
Census Bureau estimate (no margin published)
2020 Census count: 239 · ACS 2020-2024: 260 ±57
Median household income
$63,750
±$28,194 (90% margin)
Minnesota: $89,062
Median home value
$79,600
±$39,901 (90% margin)
Minnesota: $329,300
Median gross rent
$950
±$592 (90% margin)
Minnesota: $1,280
Where is Oslo and what county is it in?
Oslo is a city in Marshall County, Minnesota. It covers 0.4 square miles of land, 644 residents per square mile in 2020.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Oslo, and is it growing?
The Census Bureau estimates that 239 people lived in Oslo on July 1, 2025, down 0.4% since 2020, while Minnesota grew 2.2%. The 2020 Census counted 239 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 260 (±57).
| Measure | Oslo | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 260 ±57 | 8,909 | no clear change |
| Households | 109 ±26 | 3,781 | no clear change |
| Average household size | 2.39 ±0.33 | 2.32 | no clear change |
| Housing units | 126 ±29 | 4,396 | no clear change |
Oslo's population since 2000
From 347 in 2000 to 239 in 2025: down 31.1%. The 2000, 2010 and 2020 figures are census counts, each for Oslo as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. 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); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Oslo?
The median resident of Oslo is 33.1 years old; 31.5% are under 18 and 8.8% are 65 or older. The largest group is non-Hispanic white residents at 63.8%, then Hispanic or Latino residents (of any race) at 35.0%. 9.2% of residents were born outside the United States.
| Measure | Oslo | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.1 ±1.8 | 43.2 | no clear change |
| Under 18 years | 31.5% ±7.9 pts | 23.3% | – |
| 65 years and over | 8.8% ±5.5 pts | 23.0% | – |
| Male | 63.8% ±8.6 pts | 51.3% | – |
| Hispanic or Latino (any race) | 35.0% ±15.6 pts | 4.8% | no clear change |
| White alone, not Hispanic | 63.8% ±15.6 pts | 91.0% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±8.3 pts | 0.4% | – |
| Asian alone, not Hispanic | 0.0% ±8.3 pts | 0.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±8.3 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±8.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.2% ±1.5 pts | 2.8% | – |
| Some other race alone, not Hispanic | 0.0% ±8.3 pts | 0.4% | – |
| Born outside the United States | 9.2% ±5.8 pts | 2.0% | – |
| Speak a language other than English at home (age 5+) | 32.0% ±15.3 pts | 4.2% | – |
| Civilian veterans (age 18+) | 6.2% ±4.7 pts | 7.3% | – |
| With a disability | 7.7% ±4.7 pts | 13.1% | – |
| No health insurance coverage | 16.2% ±11.0 pts | 4.6% | – |
| High school graduate or higher (age 25+) | 90.5% ±10.0 pts | 93.0% | – |
| Bachelor's degree or higher (age 25+) | 11.2% ±7.2 pts | 18.7% | no clear change |
| Graduate or professional degree (age 25+) | 3.0% ±3.1 pts | 3.5% | – |
| Lived in the same house a year earlier | 91.1% ±6.9 pts | 92.2% | – |
| Moved from another state in the past year | 3.2% ±4.5 pts | 1.4% | – |
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 Oslo earn?
Half of Oslo's 109 households earn less than $63,750 a year (±$28,194), against $72,543 in Marshall County and $89,062 in Minnesota. In 2015-2019 it was $69,740 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Oslo | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $63,750 ±$28,194 | $72,543 | no clear change |
| Mean household income | $77,916 ±$11,345 | $86,673 | – |
| Per capita income | $32,976 ±$6,513 | $37,984 | no clear change |
| People below the poverty line | 5.8% ±6.1 pts | 8.3% | – |
| Children under 18 below the poverty line | 0.0% ±23.7 pts | 9.8% | – |
| Households receiving SNAP | 9.2% ±7.1 pts | 6.5% | – |
| Households with a computer | 100.0% ±18.5 pts | 92.3% | – |
| Households with a broadband subscription | 92.7% ±6.6 pts | 87.4% | – |
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 Oslo?
Owners occupy 85.3% of Oslo's occupied homes and renters 14.7%. The median owner-occupied home is valued at $79,600 by its owner (±$39,901). The median renter pays $950 a month including utilities.
| Measure | Oslo | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $79,600 ±$39,901 | $164,500 | no clear change |
| Median gross rent | $950 ±$592 | $690 | no clear change |
| Renters paying 35% or more of income on rent | 14.3% ±28.2 pts | 20.9% | – |
| Median monthly owner costs, with a mortgage | $1,319 ±$228 | $1,369 | – |
| Owner-occupied homes | 85.3% ±9.8 pts | 83.0% | no clear change |
| Renter-occupied homes | 14.7% ±9.8 pts | 17.0% | – |
| Housing units | 126 ±29 | 4,396 | no clear change |
| Homeowner vacancy rate | 0.0% ±21.3 pts | 0.8% | – |
| Rental vacancy rate | 0.0% ±61.7 pts | 9.5% | – |
| Single-family detached homes | 79.4% ±10.7 pts | 79.8% | – |
| Mobile homes | 18.3% ±10.8 pts | 9.6% | – |
| Built 2020 or later | 0.0% ±16.3 pts | 1.0% | – |
| Built 2010 to 2019 | 0.0% ±16.3 pts | 3.6% | – |
| Built 1939 or earlier | 27.0% ±14.2 pts | 21.3% | – |
| Households with no vehicle | 0.0% ±18.5 pts | 4.6% | – |
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 Oslo building?
Builders took permits for 0 new housing units in Oslo in 2025 (0 in single-family houses), 0.0 per 1,000 residents against 3.6 across Minnesota.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Oslo work and get to work?
74.6% of Oslo's workers drive alone. The average trip to work takes 29.5 minutes.
| Measure | Oslo | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 75.4% ±9.0 pts | 62.7% | – |
| Unemployment rate | 5.1% ±6.3 pts | 3.5% | – |
| Drove alone to work | 74.6% ±10.9 pts | 76.0% | – |
| Carpooled | 10.8% ±7.0 pts | 8.5% | – |
| Public transportation | 0.0% ±15.8 pts | 0.0% | – |
| Walked | 12.3% ±10.2 pts | 4.1% | – |
| Worked from home | 2.3% ±2.8 pts | 10.0% | – |
| Mean travel time to work | 29.5 min ±7.9 | 23.1 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 census tracts are in Oslo?
No census tract lies mostly in Oslo; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 803Marshall County | 1,895 | $78,958 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Oslo) · Census block assignment files
How does Oslo compare with other places in Minnesota?
By the Census Bureau's July 2025 estimates, Oslo is the 15,938th-most populous of the 19,476 U.S. incorporated places that have one and the 627th-most populous of 855 in Minnesota.
Oslo is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 627th | 855 |
Oslo's figures with every place in Minnesota (CSV)
Every place in Minnesota, sortable · Compare Oslo with other places
Source: PlainCities ranks computed 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 reliable are the figures for Oslo?
24 of the 57 figures for Oslo on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
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 Oslo 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' public schools in Oslo.