Overview
          65
                  Total Population
                20.8
                  Median age
                27.69%
                  Female population %
                261.1:100
                  Gender ratio (M:F)
                5-9 years
                  Largest age group
                62.5
                  Total dependency ratio
                Black or African American
                  Largest racial group
                Zero
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Mcnab's population is young compared to the rest of the country:
- The median age in Mcnab is 20.8, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Mcnab's population under 18 was 29.23%, compared to the 22.51% nationwide.
 - Mcnab's elderly or the senior population (over 65 age) was 9.23% as compared to 16.04% nationwide.
 - Of the total population in Mcnab, 29.23% were under the age of 15, 24.62% aged 15 to 29, 36.92% aged 30 to 64, 9.23% aged 65 to 84, and 0.00% were 85 years of age and older.
 
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Gender
There are 29 less females than males in Mcnab:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 27.69% females and 72.31% males in Mcnab, AR.
 - The Mcnab, AR gender ratio is 261.1:100 i.e. 261.1 men to 100 women (2.611).
 - For male population, the largest age group is 5-9 years with a population of 19.
 - For the female population, the largest age group is 60-64 years with a population of 9.
 
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Race / Ethnicity
Mcnab's population is not that diverse:
- Racial distribution of Mcnab population: 7.69% are White and 92.31% are Black or African American.
 - Mcnab's racial breakdown clearly shows that there is an absolute majority of Black or African American population in the town.
 - By ethnicity, Zero is Hispanic or Latino (of any race), and 65 (100% of the total population) is Non-Hispanic.
 - The largest racial group in Mcnab is Black or African American with a population of 6 (92.31% of the total population).
 
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Year by year
Mcnab's population has already reached its peak and is showing a trend of decline:
- The peak population was 70 in the year 2010
 - From 2000 to 2010, Mcnab's population increased by 4 (6.06%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Mcnab's population decreased by 40 (57.14%), 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, Mcnab's population was lowest in year 2021 at 29.
 
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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)