Overview
          41
                  Total Population
                39.5
                  Median age
                43.90%
                  Female population %
                127.8:100
                  Gender ratio (M:F)
                0-4 years
                  Largest age group
                127.8
                  Total dependency ratio
                White
                  Largest racial group
                Zero
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Lengby's population is old compared to the rest of the country:
- The median age in Lengby is 39.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Lengby's population under 18 was 36.59%, compared to the 22.51% nationwide.
 - Lengby's elderly or the senior population (over 65 age) was 19.51% as compared to 16.04% nationwide.
 - Of the total population in Lengby, 36.59% were under the age of 15, 4.88% aged 15 to 29, 39.02% aged 30 to 64, 19.51% aged 65 to 84, and 0.00% were 85 years of age and older.
 
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Gender
There are 5 less females than males in Lengby:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 43.90% females and 56.10% males in Lengby, MN.
 - The Lengby, MN gender ratio is 127.8:100 i.e. 127.8 men to 100 women (1.278).
 - For male population, the largest age group is 0-4 years with a population of 9.
 - For the female population, the largest age group is 55-59 years with a population of 8.
 
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Race / Ethnicity
Lengby's population is moderately diverse:
- Racial distribution of Lengby population: 80.49% are White, 2.44% are American Indian and Alaska Native and 17.07% are some other race.
 - Lengby's racial breakdown clearly shows that there is an absolute majority of White population in the city.
 - By ethnicity, Zero is Hispanic or Latino (of any race), and 41 (100% of the total population) is Non-Hispanic.
 - The largest racial group in Lengby is White with a population of 33 (80.49% of the total population).
 
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Year by year
Lengby's population has already reached its peak and is showing a trend of decline:
- The peak population was 91 in the year 2020
 - From 2000 to 2010, Lengby's population increased by 7 (8.86%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Lengby's population increased by 5 (5.81%), 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, Lengby's population was lowest in year 2008 at 76.
 
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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)