Overview
          224
                  Total Population
                52.4
                  Median age
                41.07%
                  Female population %
                143.5:100
                  Gender ratio (M:F)
                65-69 years
                  Largest age group
                124.0
                  Total dependency ratio
                White
                  Largest racial group
                Zero
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Lima's population is old compared to the rest of the country:
- The median age in Lima is 52.4, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Lima's population under 18 was 21.43%, compared to the 22.51% nationwide.
 - Lima's elderly or the senior population (over 65 age) was 37.50% as compared to 16.04% nationwide.
 - Of the total population in Lima, 17.86% were under the age of 15, 16.96% aged 15 to 29, 27.68% aged 30 to 64, 34.38% aged 65 to 84, and 3.12% were 85 years of age and older.
 
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Gender
There are 40 less females than males in Lima:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 41.07% females and 58.93% males in Lima, MT.
 - The Lima, MT gender ratio is 143.5:100 i.e. 143.5 men to 100 women (1.435).
 - For male population, the largest age group is 65-69 years with a population of 26.
 - For the female population, the largest age group is 20-24 years with a population of 14.
 
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Race / Ethnicity
Lima's population is non diverse:
- Racial distribution of Lima population: 94.20% are White and 5.80% are multiracial.
 - Lima's racial breakdown clearly shows that there is an absolute majority of White population in the town.
 - By ethnicity, Zero is Hispanic or Latino (of any race), and 224 (100% of the total population) is Non-Hispanic.
 - The largest racial group in Lima is White with a population of 211 (94.20% of the total population).
 
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Year by year
Lima's population has already reached its peak and is showing a trend of decline:
- The peak population was 241 in the year 2000
 - From 2000 to 2010, Lima's population decreased by 20 (8.30%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Lima's population decreased by 11 (4.98%), 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, Lima's population was lowest in year 2020 at 210.
 
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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)