Rock Rapids, IA Profile: Facts, Map & Data


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Rock Rapids, Iowa - Basic Facts

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The City of Rock Rapids had a population of 2,496 as of July 1, 2016.

The primary coordinate point for Rock Rapids is located at latitude 43.4259 and longitude -96.1657 in Lyon County. The formal boundaries for the City of Rock Rapids (see map below) encompass a land area of 3.96 sq. miles and a water area of 0 sq. miles. Lyon County is in the Central time zone (GMT -6). The elevation is 1,388 feet.

The City of Rock Rapids (GNIS ID: 2396402) 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 Rock Rapids is located within Township of Rock, a minor civil division (MCD) of Lyon County.

Beneath the boundary map are tables with Rock Rapids population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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City of Rock Rapids, IA Boundary Map

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Boundary Maps: Township of Rock | Lyon County | Iowa Counties

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Rock Rapids, IA Data & Demographics (As of July 1, 2016)


Total Population 2,496
Population in Households 2,413
Population in Familes 1,969
Population in Group Qrtrs 83
Population Density1 631
Diversity Index2 10


Total Households 1,057
Average Household Size 2.28
Family Households 673
Average Family Size 3


Total Housing Units 1,214 (100%)
Owner Occupied HU 795 (65.5%)
Renter Occupied HU 262 (21.6%)
Vacant Housing Units 157 (12.9%)
Median Home Value $106,327
Average Home Value $128,742


Median Household Income $48,935
Average Household Income $62,739
Per Capita Income $26,624
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.34% -0.18%
Households -0.39% -0.21%
Families -0.38% -0.33%
Median Household Income   2.09%
Per Capita Income   2.31%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Rock Rapids, IA - Peer Comparisons by Rank and Percentile

The table below compares Rock Rapids to the other 1,009 incorporated cities, towns and CDPs in Iowa by rank and percentile using July 1, 2016 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 # 135 87th
Population Density1 # 543 46th
Diversity Index2 # 452 55th
Median Household Income # 650 36th
Per Capita Income # 525 48th

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

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