Marble Rock, Iowa
Marble Rock: City in Floyd County, Iowa
About
Marble Rock is a city located in the county of Floyd in the U.S. state of Iowa. Its population at the 2010 census was 307 and a population density of 137 people per km². After 10 years in 2020 city had an estimated population of 287 inhabitants.
Quick Facts about Marble Rock
| Population : | 287 (2020) |
| Country : | United States of America |
| State : | Iowa (United States) |
| County : | Floyd County |
| Postal code : | 50653 |
| Area : | 2.25 km2 |
| Altitude : | 1,001 feet / 305 meters |
| Time Zone : | America/Chicago |
| Local time : | 15:28:54 (5th December 2025) |
| Density : | 128 Pop. per km² as of 2020 |
| Population growth : | -6.97% (2010-2020) |
Geography
Marble Rock is located at 42°57'55"N 92°52'7"W (42.9652500, -92.8685300).
Marble Rock map
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Demographics
According to census records, the population of Marble Rock decreased by 6.97% in 10 years.
| Year | Population | % Change | Method |
| 2010 | 307 | - | census |
| 2011 | 303 | -1.32% | estimation process |
| 2012 | 303 | 0% | estimation process |
| 2013 | 300 | -1% | estimation process |
| 2014 | 299 | -0.33% | estimation process |
| 2015 | 297 | -0.67% | estimation process |
| 2016 | 293 | -1.37% | estimation process |
| 2017 | 292 | -0.34% | estimation process |
| 2018 | 289 | -1.04% | estimation process |
| 2019 | 287 | -0.7% | estimation process |
| 2020 | 287 | 0% | estimation process |
Marble Rock zip code is 50653.
County name: Floyd, County
fips: 19067
Schools in Marble Rock
College & universities near Marble Rock, IA
| Code | Name | City | ZIP |
|---|---|---|---|
| 154059 | North Iowa Area Community College | Mason City (IA) | 50401 |
Post offices near Marble Rock
| Post Office Name | City | ZIP |
|---|---|---|
| Marble Rock Post Office | Marble Rock (IA) | 50653 |
Other cities in Floyd County
Cities, towns, neighborhoods & other populated places in Floyd County , IA.
| City Name | Population | Title |
|---|---|---|
| Charles City | 7,307 | City in Iowa |
| Nora Springs | 1,342 | City in Iowa, United States of America |
| Rockford | 813 | Human settlement in Floyd County, Iowa, United States of America |
| Rudd | 343 | Human settlement in Floyd County, Iowa, United States of America |
| Floyd | 313 | City in Floyd County, Iowa, United States of America |
| Colwell | 67 | City in Floyd County, Iowa, United States |
