Overview
          809
                  Total Population
                42.0
                  Median age
                53.15%
                  Female population %
                88.1:100
                  Gender ratio (M:F)
                5-9 years
                  Largest age group
                78.2
                  Total dependency ratio
                White
                  Largest racial group
                Zero
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Lilly's population is old compared to the rest of the country:
- The median age in Lilly is 42.0, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Lilly's population under 18 was 23.61%, compared to the 22.51% nationwide.
 - Lilly's elderly or the senior population (over 65 age) was 22.87% as compared to 16.04% nationwide.
 - Of the total population in Lilly, 21.01% were under the age of 15, 15.95% aged 15 to 29, 40.17% aged 30 to 64, 19.90% aged 65 to 84, and 2.97% were 85 years of age and older.
 
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Gender
There are 51 more females than males in Lilly:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 53.15% females and 46.85% males in Lilly, PA.
 - The Lilly, PA gender ratio is 88.1:100 i.e. 88.1 men to 100 women (0.881).
 - For male population, the largest age group is 5-9 years with a population of 39.
 - For the female population, the largest age group is 0-4 years with a population of 41.
 
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Race / Ethnicity
Lilly's population is moderately diverse:
- Racial distribution of Lilly population: 99.13% are White, 0.49% are Black or African American and 0.37% are multiracial.
 - Lilly's racial breakdown clearly shows that there is an absolute majority of White population in the borough.
 - By ethnicity, Zero is Hispanic or Latino (of any race), and 809 (100% of the total population) is Non-Hispanic.
 - The largest racial group in Lilly is White with a population of 802 (99.13% of the total population).
 
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Year by year
Lilly's population has already reached its peak and is showing a trend of decline:
- The peak population was 974 in the year 2000
 - From 2000 to 2010, Lilly's population decreased by 10 (1.03%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Lilly's population decreased by 86 (8.92%), 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, Lilly's population was lowest in year 2022 at 865.
 
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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)