Overview
          180
                  Total Population
                45.3
                  Median age
                35.00%
                  Female population %
                185.7:100
                  Gender ratio (M:F)
                10-14 years
                  Largest age group
                81.8
                  Total dependency ratio
                White
                  Largest racial group
                1
                  Hispanic population
                Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Marble's population is old compared to the rest of the country:
- The median age in Marble is 45.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
 - Marble's population under 18 was 24.44%, compared to the 22.51% nationwide.
 - Marble's elderly or the senior population (over 65 age) was 22.22% as compared to 16.04% nationwide.
 - Of the total population in Marble, 22.78% were under the age of 15, 2.78% aged 15 to 29, 52.22% aged 30 to 64, 22.22% aged 65 to 84, and 0.00% were 85 years of age and older.
 
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Gender
There are 54 less females than males in Marble:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 35.00% females and 65.00% males in Marble, CO.
 - The Marble, CO gender ratio is 185.7:100 i.e. 185.7 men to 100 women (1.857).
 - For male population, the largest age group is 10-14 years with a population of 38.
 - For the female population, the largest age group is 30-34 years with a population of 11.
 
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Race / Ethnicity
Marble's population is moderately diverse:
- Racial distribution of Marble population: 98.89% are White, 0.56% are American Indian and Alaska Native and 0.56% are some other race.
 - Marble's racial breakdown clearly shows that there is an absolute majority of White population in the town.
 - By ethnicity, 1 is Hispanic or Latino (of any race), and 179 (99.44% of the total population) is Non-Hispanic.
 - The largest racial group in Marble is White with a population of 178 (98.89% of the total population).
 
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Year by year
Marble's population has already reached its peak and is showing a trend of decline:
- The peak population was 139 in the year 2019
 - From 2000 to 2010, Marble's population increased by 9 (8.11%), as compared to the national growth of 9.63%.
 - From 2010 to 2020, Marble's population increased by 11 (9.17%), 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, Marble's population was lowest in year 2003 at 108.
 
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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)