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 2,486 as of July 1, 2017.

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, 2017.

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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, 2017)


Total Population 2,486
Daytime Population: Workers 1,753
Daytime Population: Residents 1,182
Total Daytime Population (TDP) 2,935
Ratio TDP/Total Population1 1.18
Population in Households 2,403
Population in Familes 1,959
Population in Group Qrtrs 83
Population Density2 628
Diversity Index3 10


Median Household Income $50,370
Average Household Income $63,938
Per Capita Income $27,183


Total Housing Units 1,207 (100%)
Owner Occupied HU 795 (65.9%)
Renter Occupied HU 260 (21.5%)
Vacant Housing Units 152 (12.6%)
Median Home Value $115,951
Average Home Value $134,265


Total Households 1,055
Average Household Size 2.28
Family Households 669
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population -0.34% -0.19%
Households -0.36% -0.19%
Families -0.41% -0.3%
Median Household Income   2.5%
Per Capita Income   3.09%

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, 2017 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 # 137 87th
Population Density # 547 46th
Diversity Index # 506 51st
Median Household Income # 673 33rd
Per Capita Income # 522 48th

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

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