Marble Rock, IA Profile: Facts & Data


Marble Rock Local Links & Resources:
Hotels | Resources | ALL Marble Rock Content

Also See: Marble Rock, IA ZIP Codes & ZIP Code Maps | Local Area Photos

Marble Rock, Iowa - Basic Facts

The City of Marble Rock had a population of 294 as of July 1, 2018.

The primary coordinate point for Marble Rock is located at latitude 42.9646 and longitude -92.8678 in Floyd County. The formal boundaries for the City of Marble Rock (see map below) encompass a land area of 0.83 sq. miles and a water area of 0.04 sq. miles. Floyd County is in the Central time zone (GMT -6). The elevation is 1,004 feet.

The City of Marble Rock (GNIS ID: 2395001) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Marble Rock is located within Township of Union, a minor civil division (MCD) of Floyd County.

Beneath the boundary map are tables with Marble Rock population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

Jump to... (On This Page!)
  1. Marble Rock 2018 Demographic Data
  2. Growth Rates for Marble Rock (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Iowa Research Tools (Easy Tools & Current Data)
  3. Iowa Data Comparison Tool - 2018 Demographics

Explore a Iowa Address and get...

Boundary Maps, Demographic Data, School Zones Input an address to see boundary maps and recent demographic data for the neighborhood, city, county, and ZIP Code. You'll also find the school attendance zones for that address. For a rapid response, use this format: 321 Main Street, City, IA 12345.


Marble Rock, IA Data & Demographics (As of July 1, 2018)


Total Population 294
Population in Households 294
Population in Familes 244
Population in Group Qrtrs 0
Population Density2 354
Diversity Index3 12


Median Household Income $58,191
Average Household Income $90,484
Per Capita Income $36,623


Total Housing Units 149 (100%)
Owner Occupied HU 107 (71.8%)
Renter Occupied HU 22 (14.8%)
Vacant Housing Units 20 (13.4%)
Median Home Value $125,000
Average Home Value $142,130


Total Households 129
Average Household Size 2.28
Family Households 90
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2018 2018-2023
Population -0.52% -0.34%
Households -0.46% -0.47%
Families 0.84% -0.45%
Median Household Income   1.99%
Per Capita Income   2.55%

Marble Rock, IA - Peer Comparisons by Rank and Percentile

The table below compares Marble Rock to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 602 40th
Population Density # 740 27th
Diversity Index # 405 60th
Median Household Income # 386 62nd
Per Capita Income # 89 91st

Additional comparisons and rankings can be made with a VERY EASY TO USE Iowa Census Data Comparison Tool.

Quick & Easy Ways to...

  1. Get Current Demographic Data for Cities, Towns, and ZIP Codes
  2. View Boundary Maps, for Cities, Towns, and ZIP Codes
  3. Locate Physical, Cultural, and Historical Features
  4. Research Public Schools & Attendance Zones

Iowa Census Data Comparison Tool

Compare Iowa July 1, 2018 Data
Highest or Lowest: