Oslo, MN

City in Marshall County, MN, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

260

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

33.1

years ∙ half population younger than 33.1, half older

Diversity Index

47%

chance two random people differ in race and ethnicity

Nativity

9.2%

foreign-born population

90.8%Native

9.2% Foreign-born

Geographic Context

Location, size, and surroundings

About

Oslo is a city within Marshall County, Minnesota, United States.

Location

City in Marshall County, MN, US

Co-ordinates

DEC48.195632° N, 97.131440° W

DMS48° 11′ 44.28″ N, 97° 07′ 53.18″ W

Population Density & area

700.8/sq mi (270.8/km²)

Total Area

0.389 sq mi (1.007 km²)

Land Area

0.371 sq mi (0.96 km²) · 95.3%

Water Area

0.018 sq mi (0.047 km²) · 4.7%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

63.8% male

Male 63.8%

Female 36.2%

males per 100 females

Oslo 176.6

Marshall County 105.3

Minnesota 100.4

Nativity

9.2%

foreign-born population

90.8%Native

9.2% Foreign-born

% Foreign-born

Oslo 9.2%

Marshall County 2%

Minnesota 8.7%

Age Distribution

How the population is spread across age groups

Median Age

33.1

years ∙ half population younger than 33.1, half older

Oslo

33.1

Marshall County

43.2

Minnesota

38.8

Dependency ratio

67.7

dependents per 100 working-age adults

Oslo 67.7

Marshall County 86.5

Minnesota 67.1

AGE DISTRIBUTION

Distribution of age group

Median age

	Oslo	Marshall County	Minnesota
Age Group
Children (Under 18)	31.5%	23.3%	22.9%
Working age (18-64)	59.7%	53.7%	59.8%
Senior (65+)	8.8%	23%	17.3%
Dependency ratio
Total dependency ratio	67.7	86.5	67.1
Child dependency ratio	52.9	43.5	38.2
Old-age dependency ratio	14.8	42.9	28.9

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

63.8%

Black

Asian

Hispanic

35%

Other

1.2%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

47%

chance two random people differ in race and ethnicity

Oslo 47%

Marshall County 16.9%

Minnesota 41%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Oslo population

	Oslo	Marshall County	Minnesota
Hispanic or Latino	35%	4.8%	6.4%
Mexican	35%	3.9%	3.9%
Puerto Rican	0%	0.1%	0.3%
Cuban	0%	0%	0.1%
Other Hispanic / Latino	0%	0.8%	2%
Not Hispanic or Latino	65%	95.2%	93.6%
One race	63.8%	92.4%	89.1%
White	63.8%	91%	75.9%
Black or African American	0%	0.4%	6.9%
American Indian and Alaska Native	0%	0.2%	0.7%
Asian	0%	0.3%	5.1%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	0%	0.4%	0.5%
Two or more races (Multiracial)	1.2%	2.8%	4.5%

Household & Families Composition

Household size, type, and family structure

Household structure

55% family

Family 55%

Non family 45%

% family households

Oslo 55%

Marshall County 62.8%

Minnesota 62.3%

Average household size

2.39

persons per household

Oslo

2.39

Marshall County

2.32

Minnesota

2.43

Household & Family COMPOSITION

Households

Percentage of Oslo population

	Oslo	Marshall County	Minnesota
Total households	109	3,781	2,307,955
Average houshold size	2.39	2.32	2.43
Family households	60	2,373	1,438,404
Average family size	3.42	2.94	3.04
Married couple family	49	1,961	1,129,003
Other families	11	412	309,401
Male householder	11	163	102,922
Female householder	0	249	206,479
Non-family households	49	1,408	869,551
One-person households	39	1,237	686,475
Male householder	25	717	320,418
Senior (65+) living alone	1	229	97,557
Female householder	14	520	366,057
Senior (65+) living alone	9	294	186,557
Other living arrangements	10	171	183,076

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

126

housing units

Oslo 126

Marshall County 4,396

Minnesota 2,545,030

Occupancy status

86.5% occupied

Occupied 86.5%

Vacant 13.5%

vacancy rate

Oslo 13.5%

Marshall County 14%

Minnesota 9.3%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

79.4%

Single family houses

79.4%

Apartments in multi-unit structures

2.4%

Mobile homes

18.3%

Boat, RV, van, etc

Median Year Built

1971

Half of houses were built before 1971, and half after.

Historic ∙ 1939 or earlier

27%

Postwar & mid-century ∙ 1940 - 1969

22.2%

Late 20th century ∙ 1970 - 1999

50%

Modern ∙ 2000 or later

0.8%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Oslo	Marshall County	Minnesota
Rooms per unit
Median rooms	5.9	6	6.1
1–3 rooms	15.1%	11.3%	14.9%
4–6 rooms	50%	47.6%	41.4%
7+ rooms	34.9%	41%	43.7%
Bedrooms
No bedroom / studio	0%	0.8%	2.7%
1 bedroom	7.9%	9.1%	11.4%
2 bedrooms	25.4%	21%	24.5%
3 bedrooms	37.3%	42.9%	32.2%
4+ bedrooms	29.4%	26.3%	29.1%
At a glance
Median year built	1971	1971	1979
Total housing units	126	4,396	2,545,030

Occupancy Profile

Who is inside and how they use it

Homeownership

85.3% owners

Renter-occupied 14.7%

Owner-occupied 85.3%

homeownership rate

Oslo 85.3%

Marshall County 83%

Minnesota 72.2%

Average household size

2.37

Owner-occupied

2.5

Renter-occupied

owner-occupied average size

Oslo 2.37

Marshall County 2.42

Minnesota 2.59

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Oslo	Marshall County	Minnesota
Total occupied units	109	3,781	2,307,955
Year moved in
2020 or later	12.8%	12.7%	23.8%
2010 to 2019	50.5%	34.4%	38.9%
2000 to 2009	13.8%	19.7%	16.1%
1999 or earlier	22.9%	33.2%	21.2%
Occupants per room
1.00 or fewer	100%	99%	97.7%
1.01 to 1.50	0%	0.7%	1.5%
1.51 or more	0%	0.3%	0.8%
Vehicles availability
No vehicles	0%	4.6%	6.7%
1 vehicle	23.9%	22%	30.8%
2 vehicles	46.8%	37.2%	39.5%
3 or more vehicles	29.4%	36.2%	23.1%
House heating fuel used
Gas	49.5%	62.2%	75.9%
Electricity	24.8%	24.6%	19.4%
Solar	0%	0.1%	0.1%
Fuel oil, kerosene etc	23.9%	7.1%	1.3%
All other fuels	1.8%	5.5%	2.5%
No fuel used	0%	0.5%	0.9%
Selected characteristics
Lacking complete plumbing	0%	0.6%	0.4%
Lacking complete kitchen	0%	0.7%	0.7%
No telephone service available	0%	1.1%	0.7%

Housing Value

What owner-occupied units are worth

Median home value

$79,600

owner-occupied units

Median value(USD)

Oslo

$79,600

Marshall County

$164,500

Minnesota

$329,300

Housing Cost Burden

27.3%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

27.3%

Owners without a mortgage

18.3%

Renters

14.3%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Oslo	Marshall County	Minnesota
Property value
Median Value	$79,600	$164,500	$329,300
Under $100,000	52.7%	28%	7.7%
$100,000 - $200,000	37.7%	34.6%	13.3%
$200,000 - $300,000	7.5%	21.6%	22.6%
$300,000 - $500,000	0%	12.3%	36.9%
$500,000 - $1,000,000	2.2%	3.3%	17%
$1,000,000 and more	0%	0.2%	2.6%
Owner-occupied households
With a mortgage	35.5%	44.2%	64%
Without a mortgage	64.5%	55.8%	36%
Median monthly owner costs
With a mortgage	$1,319	$1,369	$1,947
Without a mortgage	$532	$567	$698
Gross rent
Median rent	$950	$690	$1,280

Education Profile

How educated is the community and how education pays off

Adults with a college degree

11.2%

of adults 25+ with a bachelor's degree or higher

Oslo 11.2%

Marshall County 18.7%

Minnesota 39.4%

Adults without a high school diploma

9.5%

of adults (25+) without a high school diploma

Oslo 9.5%

Marshall County 7%

Minnesota 6.1%

School Enrollment

Who is enrolled in school and at what level

School enrollment

population (age 3+) enrolled in school

Nursery / Preschool

18.6%

K–12

69.5%

College / Undergraduate

10.2%

Graduate / Professional

1.7%

College-going rate (18-24 yr olds)

of 18-24-year-olds in college or graduate school

Oslo

Marshall County

21%

Minnesota

39.1%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Oslo	Marshall County	Minnesota
Total enrolled (age 3+)	59	1,869	1,385,086
Nursery / preschool	18.6%	7.7%	6.2%
K–12	69.5%	79.2%	69.9%
Kindergarten	15.3%	6.8%	5.2%
Elementary: Grades 1–4	37.3%	24.1%	20.6%
Elementary: Grades 5–8	6.8%	20.5%	21.7%
High School: Grades 9–12	10.2%	27.8%	22.4%
College or graduate school	11.9%	13.1%	23.9%
College, undergraduate	10.2%	9.7%	18.8%
Graduate, professional school	1.7%	3.4%	5.1%
College-going rate · 18-24 yr olds	0%	21%	39.1%
School type
Public school	96.6%	89.5%	83.3%
Private school	3.4%	10.5%	16.7%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

169

population 25 years and over

Total adults (25+)

Less than 9th grade

8.3%

9th-12th, no diploma

1.2%

HS graduate

42.6%

Some college no degree

23.1%

Associates degree

13.6%

Bachelors degree

8.3%

Graduate or professional degree

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

50% · 50%

9th-12th, no diploma

100% · 0%

HS graduate

72.2% · 27.8%

Some college no degree

48.7% · 51.3%

Associates degree

73.9% · 26.1%

Bachelors degree

64.3% · 35.7%

Graduate or professional degree

0% · 100%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Oslo	Marshall County	Minnesota
Population (25+)	169	6,291	3,923,744
Less than 9th grade	8.3%	2.2%	2.7%
9th–12th, no diploma	1.2%	4.8%	3.4%
High school diploma or GED	42.6%	37.3%	23.3%
Some college, no degree	23.1%	21.8%	19.5%
Associate's degree	13.6%	15.1%	11.8%
Bachelor's degree or higher	11.2%	18.7%	39.4%
Bachelor's degree	8.3%	15.3%	25.6%
Graduate or professional	3%	3.5%	13.8%
High School or higher	90.5%	93%	93.9%

Earnings by education level

percentage as applicable

Median Earnings

$44,375

Median earnings for adults 25+, by level

Less than HS graduate

$20,357

HS graduate

$41,471

Some college or associates

$53,500

Bachelors degree

$76,071

Graduate or professional degree

$65,625

Poverty Rate

for ages 25+, with bachelors degree or higher

Less than HS graduate

HS graduate

11.1%

Some college or associates

11.3%

Bachelors degree or higher

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Oslo	Marshall County	Minnesota
Median earnings
Population 25+, with earnings	$44,375	$52,261	$58,615
Less than high school graduate	$20,357	$34,853	$36,257
High school graduate (includes equivalency)	$41,471	$49,293	$42,951
Some college or associate's degree	$53,500	$51,114	$51,845
Bachelor's degree	$76,071	$63,618	$73,301
Graduate or professional degree	$65,625	$66,023	$89,644
Poverty rates
Less than high school graduate	0%	18.9%	23.7%
High school graduate (includes equivalency)	11.1%	9.5%	12.3%
Some college or associate's degree	11.3%	5.5%	7.8%
Bachelor's degree or higher	0%	3.1%	3.2%

Insights for Oslo, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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