Iowa 2020 census data: City population change

What’s the fastest growing city in Iowa? Tiffin, which grew by over 131 percent since 2010, according to 2020 U.S. Census data. The state overall grew 4.7 percent, adding 144,014 people for a total population of 3,190,369.

This animated graphic shows Iowa’s most populated cities, starting with the 1850 census. You can browse the 2010 to 2020 census population changes for all Iowa cities in the searchable database below the graphic.

Click the pause button to move through the timeline, or select the Lowest button to see the lowest populated cities:

Browse or search the database below to learn how much other Iowa cities grew or shrank since 2010.

» County data: Interactive map and searchable database

Click on the different column headers to sort the list by population year or percent change.