Overview
          296
                  Total Population
                29.8
                  Median age
                44.93%
                  Female population %
                122.6:100
                  Gender ratio (M:F)
                5-9 years
                  Largest age group
                60.0
                  Total dependency ratio
                White
                  Largest racial group
                118
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Oslo's population is young compared to the rest of the country:
- The median age in Oslo is 29.8, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Oslo's population under 18 was 29.05%, compared to the 22.51% nationwide.
 - Oslo's elderly or the senior population (over 65 age) was 13.18% as compared to 16.04% nationwide.
 - Of the total population in Oslo, 24.32% were under the age of 15, 26.01% aged 15 to 29, 36.49% aged 30 to 64, 10.81% aged 65 to 84, and 2.36% were 85 years of age and older.
 
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Gender
There are 30 less females than males in Oslo:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 44.93% females and 55.07% males in Oslo, MN.
 - The Oslo, MN gender ratio is 122.6:100 i.e. 122.6 men to 100 women (1.226).
 - For male population, the largest age group is 15-19 years with a population of 28.
 - For the female population, the largest age group is 5-9 years with a population of 23.
 
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Race / Ethnicity
Oslo's population is moderately diverse:
- Racial distribution of Oslo population: 83.45% are White, 2.03% are Black or African American, 0.68% are American Indian and Alaska Native, 13.18% are some other race and 0.68% are multiracial.
 - Oslo's racial breakdown clearly shows that there is an absolute majority of White population in the city.
 - By ethnicity, 118 is Hispanic or Latino (of any race), and 178 (60.14% of the total population) is Non-Hispanic.
 - The largest racial group in Oslo is White with a population of 247 (83.45% of the total population).
 
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Year by year
Oslo's population has already reached its peak and is showing a trend of decline:
- The peak population was 348 in the year 2000
 - From 2000 to 2010, Oslo's population decreased by 18 (5.17%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Oslo's population decreased by 86 (26.06%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
 - Between the year 2000 and 2022, Oslo's population was lowest in year 2022 at 239.
 
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References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
 - U.S. Census Bureau Population Estimates Population Estimates Program (PEP)