Rock Rapids, IA Profile: Facts & Data


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Rock Rapids, Iowa - Basic Facts

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The City of Rock Rapids had a population of 2,515 as of July 1, 2018.

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, 2018.

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


Total Population 2,515
Population in Households 2,432
Population in Familes 1,966
Population in Group Qrtrs 83
Population Density1 636
Diversity Index2 9


Median Household Income $51,135
Average Household Income $66,161
Per Capita Income $28,098


Total Housing Units 1,215 (100%)
Owner Occupied HU 832 (68.5%)
Renter Occupied HU 235 (19.3%)
Vacant Housing Units 148 (12.2%)
Median Home Value $127,792
Average Home Value $139,892


Total Households 1,067
Average Household Size 2.28
Family Households 676
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 -0.16% -0.04%
Households -0.18% -0.09%
Families -0.23% -0.21%
Median Household Income   1.52%
Per Capita Income   2.53%

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, 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 # 136 87th
Population Density # 539 47th
Diversity Index # 577 43rd
Median Household Income # 693 31st
Per Capita Income # 555 45th

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

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