Rock Rapids, Iowa
Rock Rapids: City in Iowa
About
Rock Rapids is a city located in the county of Lyon in the U.S. state of Iowa. Its population at the 2010 census was 2,549 and a population density of 232 people per km². After 10 years in 2020 city had an estimated population of 2,518 inhabitants.
Quick Facts about Rock Rapids
| Population : | 2,518 (2020) |
| Country : | United States of America |
| State : | Iowa (United States) |
| County : | Lyon County |
| Postal code : | 51246 |
| Phone Area Codes : | 712 |
| Area : | 11 km2 |
| Altitude : | 1,388 feet / 423 meters |
| Capital city : | Rock Rapids is capital of Lyon County |
| Time Zone : | America/Chicago |
| Local time : | 23:48:05 (5th December 2025) |
| Density : | 229 Pop. per km² as of 2020 |
| Population growth : | -1.23% (2010-2020) |
Geography
Rock Rapids is located at 43°25'38"N 96°10'33"W (43.4271900, -96.1758600).
Rock Rapids map
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- Official Website
Official website of Rock Rapids
Demographics
According to census records, the population of Rock Rapids decreased by 1.23% in 10 years.
| Year | Population | % Change | Method |
| 2010 | 2,549 | - | census |
| 2011 | 2,567 | 0.7% | estimation process |
| 2012 | 2,568 | 0.04% | estimation process |
| 2013 | 2,561 | -0.27% | estimation process |
| 2014 | 2,560 | -0.04% | estimation process |
| 2015 | 2,566 | 0.23% | estimation process |
| 2016 | 2,550 | -0.63% | estimation process |
| 2017 | 2,547 | -0.12% | estimation process |
| 2018 | 2,546 | -0.04% | estimation process |
| 2019 | 2,522 | -0.95% | estimation process |
| 2020 | 2,518 | -0.16% | estimation process |
People born in Rock Rapids (3)
People born in Rock Rapids, including musicologist Donald Jay Grout, composer and choral director Jack Halloran, Constance Congdon, .
List
Schools in Rock Rapids
College & universities near Rock Rapids, IA
| Code | Name | City | ZIP |
|---|---|---|---|
| 154129 | Northwest Iowa Community College | Sheldon (IA) | 51201 |
Post offices near Rock Rapids
| Post Office Name | City | ZIP |
|---|---|---|
| Rock Rapid Post Office | Rock Rapids (IA) | 51246 |
Other cities in Lyon County
Cities, towns, neighborhoods & other populated places in Lyon County , IA.
| City Name | Population | Title |
|---|---|---|
| George | 1,029 | City in Iowa, USA |
| Larchwood | 918 | Township in Lyon County, Iowa |
| Inwood | 847 | City in Lyon County, Iowa, United States |
| Doon | 599 | City in Lyon County, Iowa, United States |
| Little Rock | 433 | Human settlement in Lyon County, Iowa, United States of America |
| Lester | 303 | City in Lyon County, Iowa, United States |
| Alvord | 210 | Human settlement in Lyon County, Iowa, United States of America |
Distance to Other Cities
Rock Rapids distances to largest Iowa cities
