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The total population of Marble Rock is estimated to be 271 with 156 males (57.56%) and 115 females (42.44%). There are 41 less females than males in Marble Rock.
The median household income in Marble Rock was $61,252 in 2021, which marked an a decrease of 5,887(8.77%) from $67,139 in 2020. This income is 82.10% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Marble Rock sees its highest median household income among householders in the age group of 45 to 64 years old, at $108,542. Overall, the median household income for the city of Marble Rock stands at $61,252.
In Marble Rock, the median income for all workers aged 15 years and older, regardless of work hours, was $42,561 for males and $28,270 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $67,765 for males and $47,965 for females.
In Marble Rock, population is primarily represented by White households, reporting a median income of $61,702.
In 2022, the population of Marble Rock was 265, a 0.38% decrease year-by-year from 2021. Previously, in 2021, Marble Rock's population was 266, a decline of 1.12% compared to a population of 269 in 2020.
The median age in Marble Rock, IA is 50.5, as per 2021 ACS 5-Year Estimates. Of the total population, 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.
Racial distribution of Marble Rock population: 95.10% are White and 4.90% are multiracial.