Overview
          194
                  Total Population
                38.9
                  Median age
                46.39%
                  Female population %
                115.6:100
                  Gender ratio (M:F)
                35-39 years
                  Largest age group
                110.9
                  Total dependency ratio
                White
                  Largest racial group
                Zero
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Shirleysburg's population is old compared to the rest of the country:
- The median age in Shirleysburg is 38.9, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Shirleysburg's population under 18 was 27.32%, compared to the 22.51% nationwide.
 - Shirleysburg's elderly or the senior population (over 65 age) was 29.90% as compared to 16.04% nationwide.
 - Of the total population in Shirleysburg, 22.68% were under the age of 15, 15.98% aged 15 to 29, 31.44% aged 30 to 64, 25.26% aged 65 to 84, and 4.64% were 85 years of age and older.
 
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Gender
There are 14 less females than males in Shirleysburg:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 46.39% females and 53.61% males in Shirleysburg, PA.
 - The Shirleysburg, PA gender ratio is 115.6:100 i.e. 115.6 men to 100 women (1.156).
 - For male population, the largest age group is 75-79 years with a population of 15.
 - For the female population, the largest age group is 70-74 years with a population of 15.
 
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Race / Ethnicity
Shirleysburg's population is non diverse:
- Racial distribution of Shirleysburg population: 100% are White.
 - Shirleysburg'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 194 (100% of the total population) is Non-Hispanic.
 - The largest racial group in Shirleysburg is White with a population of 194 (100% of the total population).
 
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Year by year
Shirleysburg's population has already reached its peak and is showing a trend of decline:
- The peak population was 148 in the year 2010
 - From 2000 to 2010, Shirleysburg's population increased by 8 (5.71%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Shirleysburg's population decreased by 9 (6.08%), 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, Shirleysburg's population was lowest in year 2008 at 131.
 
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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)