Marble Rock, IA Population

Overview

306

Total Population

50.5

Median age

49.67%

Female population %

101.3:100

Gender ratio (M:F)

65-69 years

Largest age group

59.4

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 Rock's population is old compared to the rest of the country:

The median age in Marble Rock is 50.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Marble Rock's population under 18 was 16.34%, compared to the 22.51% nationwide.
Marble Rock's elderly or the senior population (over 65 age) was 28.43% as compared to 16.04% nationwide.
Of the total population in Marble Rock, 8.82% were under the age of 15, 15.36% aged 15 to 29, 47.39% aged 30 to 64, 26.80% aged 65 to 84, and 1.63% were 85 years of age and older.

There are 2 less females than males in Marble Rock:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.67% females and 50.33% males in Marble Rock, IA.
The Marble Rock, IA gender ratio is 101.3:100 i.e. 101.3 men to 100 women (1.013).
For male population, the largest age group is 15-19 years with a population of 20.
For the female population, the largest age group is 65-69 years with a population of 24.

Marble Rock's population is not that diverse:

Racial distribution of Marble Rock population: 95.10% are White and 4.90% are multiracial.
Marble Rock's racial breakdown clearly shows that there is an absolute majority of White population in the city.
By ethnicity, 1 is Hispanic or Latino (of any race), and 305 (99.67% of the total population) is Non-Hispanic.
The largest racial group in Marble Rock is White with a population of 291 (95.10% of the total population).

Marble Rock's population has already reached its peak and is showing a trend of decline:

The peak population was 325 in the year 2000
From 2000 to 2010, Marble Rock's population decreased by 15 (4.62%), as compared to the national growth of 9.63%.
From 2010 to 2020, Marble Rock's population decreased by 41 (13.23%), 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 Rock's population was lowest in year 2022 at 265.