Marble Rock, Iowa

Marble Rock is a city in Floyd County, Iowa, United States, along the Shell Rock River. The population was 307 at the 2010 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.

Marble Rock, Iowa
City
Motto(s): 
Bike to Marble Rock for a 'Marbleous' Time!
Location of Marble Rock, Iowa
Coordinates: 42°57′53″N 92°52′4″W
Country United States
State Iowa
CountyFloyd
Area
 • Total0.87 sq mi (2.25 km2)
 • Land0.83 sq mi (2.15 km2)
 • Water0.04 sq mi (0.10 km2)
Elevation
1,001 ft (305 m)
Population
 • Total307
 • Estimate 
(2019)[3]
287
 • Density345.78/sq mi (133.58/km2)
Time zoneUTC-6 (Central (CST))
 • Summer (DST)UTC-5 (CDT)
ZIP code
50653
Area code(s)641
FIPS code19-49305
GNIS feature ID0458797

Geography

Marble Rock is located at 42°57′53″N 92°52′4″W (42.964695, -92.867786).[4] 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.[5]

Demographics
Historical populations
YearPop.±%
1880409—    
1890433+5.9%
1900573+32.3%
1910480−16.2%
1920483+0.6%
1930441−8.7%
1940660+49.7%
1950470−28.8%
1960442−6.0%
1970461+4.3%
1980419−9.1%
1990361−13.8%
2000326−9.7%
2010307−5.8%
2019287−6.5%
Source:"U.S. Census website". United States Census Bureau. Retrieved 2020-03-29. and Iowa Data Center
Source:
U.S. Decennial Census[6]

2010 census

As of the census[2] 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.

2000 census

As of the census[7] of 2000, there were 326 people, 141 households, and 95 families residing in the city. The population density was 390.1 people per square mile (149.8/km2). There were 157 housing units at an average density of 187.9 per square mile (72.2/km2). The racial makeup of the city was 99.39% White, and 0.61% from two or more races.

There were 141 households, out of which 26.2% had children under the age of 18 living with them, 54.6% were married couples living together, 7.1% had a female householder with no husband present, and 32.6% were non-families. 30.5% of all households were made up of individuals, and 18.4% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.78.

In the city, the population was spread out, with 21.5% under the age of 18, 10.4% from 18 to 24, 22.4% from 25 to 44, 25.2% from 45 to 64, and 20.6% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 100.0 males. For every 100 females age 18 and over, there were 96.9 males.

The median income for a household in the city was $35,500, and the median income for a family was $38,750. Males had a median income of $27,917 versus $24,688 for females. The per capita income for the city was $17,937. About 4.2% of families and 7.2% of the population were below the poverty line, including 15.4% of those under age 18 and 9.7% of those age 65 or over.

Education

The Rudd-Rockford-Marble Rock Community School District operates area public schools.[8]

References
  1. "2019 U.S. Gazetteer Files". United States Census Bureau. Retrieved July 17, 2020.
  2. "U.S. Census website". United States Census Bureau. Retrieved 2012-05-11.
  3. "Population and Housing Unit Estimates". United States Census Bureau. May 24, 2020. Retrieved May 27, 2020.
  4. "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
  5. "US Gazetteer files 2010". United States Census Bureau. Archived from the original on 2012-01-25. Retrieved 2012-05-11.
  6. "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.
  7. "U.S. Census website". United States Census Bureau. Retrieved 2008-01-31.
  8. "Rudd-Rockford-Marble Rock" (PDF). Iowa Department of Education. Retrieved 2020-03-28.
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