Johnson County Population 2017

Johnson County's estimated population is 146,547 with a growth rate of 1.37% in the past year according to the most recent United States census data. Johnson County is the 4th largest county in Iowa.

Year Population Growth Growth Rate
2016146,5471,9801.37%
2015144,5672,2871.61%
2014142,2802,5071.79%
2013139,7732,9082.12%
2012136,8653,1502.36%
2011133,7152,4221.84%
2010131,29335,17436.59%
199096,11914,40217.62%
198081,7179,59013.30%
197072,12718,46434.41%
196053,6637,90717.28%
195045,75612,56537.86%
194033,1912,9159.63%
193030,2763,81414.41%
192026,4625482.11%
191025,9141,0974.42%
190024,8171,7357.52%
189023,082-2,347-9.23%
188025,4295312.13%
187024,8987,32541.68%
186017,57313,101292.96%
18504,4722,981199.93%
18401,4910.00%

Johnson County Population Growth

Population Data via

Johnson County Race Data

Race Population Percentage
White122,14483.35%
Black or African American9,3966.41%
Asian9,2236.29%
Two or More Races3,3212.27%
American Indian and Alaska Native4220.29%
Native Hawaiian and Other Pacific Islander610.04%

Johnson County Population Pyramid

0k2k4k6k8k10k12kJohnson County Male Population0k2k4k6k8k10k12kJohnson County Female Population

Population of Cities in Johnson County

City 2010 Census 2016 Estimated Growth Growth Rate
Iowa City679467439864529.50%
Coralville189122039714857.85%
North Liberty1339118520512938.30%
Tiffin19473006105954.39%
Solon2078258750924.49%
Lone Tree13021388866.61%
Swisher879924455.12%
Oxford80581160.75%
Hills70280810615.10%
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990