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Marble Rock, Iowa
Motto(s): 
Bike to Marble Rock for a 'Marbleous' Time!
Location of Marble Rock, Iowa
Location of Marble Rock, Iowa
Country  United States
State  Iowa
County Floyd
Area
 • Total 0.87 sq mi (2.25 km2)
 • Land 0.83 sq mi (2.16 km2)
 • Water 0.04 sq mi (0.10 km2)
Elevation
1,001 ft (305 m)
Population
 (2020)
 • Total 271
 • Density 325.72/sq mi (125.72/km2)
Time zone UTC-6 (Central (CST))
 • Summer (DST) UTC-5 (CDT)
ZIP code
50653
Area code(s) 641
FIPS code 19-49305
GNIS feature ID 0458797

Marble Rock is a city in Floyd County, Iowa, United States, along the Shell Rock River. The population was 271 at the time of the 2020 census. Marble Rock has a city park, historical museums, a powerhouse on the river, and a veterans' memorial. The Marble Rock Historical Society has a website with information about the museums. [1]

Geography

Marble Rock is located at 42°57′53″N 92°52′4″W / 42.96472°N 92.86778°W / 42.96472; -92.86778 (42.964695, -92.867786). Its name derives from the presence of white limestone in the area. The Shell Rock River runs through the west side of town and is available for fishermen and small watercraft. There is a portage around the dam, on the west side of the river, for canoes.

According to the United States Census Bureau, the city has a total area of 0.87 square miles (2.25 km2), of which 0.83 square miles (2.15 km2) is land and 0.04 square miles (0.10 km2) is water.

Demographics

Historical populations
Year Pop. ±%
1880 409 —    
1890 433 +5.9%
1900 573 +32.3%
1910 480 −16.2%
1920 483 +0.6%
1930 441 −8.7%
1940 660 +49.7%
1950 470 −28.8%
1960 442 −6.0%
1970 461 +4.3%
1980 419 −9.1%
1990 361 −13.8%
2000 326 −9.7%
2010 307 −5.8%
2020 271 −11.7%
Source: and Iowa Data Center
Source:
U.S. Decennial Census

2010 census

As of the census of 2010, there were 307 people, 134 households, and 84 families residing in the city. The population density was 369.9 inhabitants per square mile (142.8/km2). There were 150 housing units at an average density of 180.7 per square mile (69.8/km2). The racial makeup of the city was 99.0% White, 0.3% Asian, and 0.7% from two or more races.

There were 134 households, of which 27.6% had children under the age of 18 living with them, 50.0% were married couples living together, 8.2% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 37.3% were non-families. 32.1% of all households were made up of individuals, and 13.4% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 2.85.

The median age in the city was 47.5 years. 21.8% of residents were under the age of 18; 5.2% were between the ages of 18 and 24; 20.4% were from 25 to 44; 32.2% were from 45 to 64; and 20.2% were 65 years of age or older. The gender makeup of the city was 48.9% male and 51.1% female.

Education

The Rudd-Rockford-Marble Rock Community School District operates area public schools.

See also

Kids robot.svg In Spanish: Marble Rock (Iowa) para niños

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