Johnson County, Iowa Population 2019

Johnson County, Iowa's estimated population is 149,213 with a growth rate of 1.60% in the past year according to the most recent United States census data. Johnson County, Iowa is the 4th largest county in Iowa.

Year Population Growth Growth Rate
2018151,2602,0471.37%
2017149,2132,3551.60%
2016146,8581,9271.33%
2015144,9312,1861.53%
2014142,7452,5851.84%
2013140,1603,0642.23%
2012137,0963,0302.26%
2011134,0662,7272.08%
2010131,33935,22036.64%
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, Iowa Population Growth

Population Data via

Population by Race

Race Population
White119,818
Black or African American9,220
Asian8,984
Two or More Races3,460
Some Other Race2,505
American Indian and Alaska Native277
Native Hawaiian and Other Pacific Islander161

Johnson County, Iowa Population Pyramid 2019

Johnson County, Iowa Median Age

29.9


Total

29.7


Male

30.3


Female

Johnson County, Iowa Adults

There are 115,187 adults, (14,933 of whom are seniors) in Johnson County, Iowa.

Johnson County, Iowa Age Dependency

44.1

Age Dependency Ratio

14.9

Old Age Dependency Ratio

29.2

Child Dependency Ratio

Johnson County, Iowa Sex Ratio

Female

72,962

50.52%

Male

71,463

49.48%

Johnson County, Iowa Households and Families

Johnson County, Iowa Renter vs Owner Occupied by Household Type

Johnson County, Iowa Household Types

Type Owner Renter
Married83.7%16.3%
All59.3%40.7%
Male56.1%43.9%
Female46.2%53.8%
Non Family37.6%62.4%

59.3%

Rate of Home Ownership

Type Count Average Size Owned
All57,4232.3759.3
Non Family26,0371.5537.6
Married25,4283.0383.7
Female4,0553.0546.2
Male1,9033.3556.1

2.97

Average Family Size

2.37

Average Household Size

7%

Unmarried (Opposite Sex)

0.6%

Unmarried (Same Sex)

Johnson County, Iowa Education

Education Attained Count Percentage
Less Than 9th Grade2,2112.61%
9th to 12th Grade1,9332.29%
High School Graduate13,84216.37%
Some College14,79617.50%
Associates Degree7,2468.57%
Bachelors Degree23,81728.17%
Graduate Degree20,70924.49%

Johnson County, Iowa Educational Attainment by Race

Name Total High School Bachelors
White70,41568,19037,857
Asian4,7044,5053,608
Black4,4333,9541,149
Hispanic3,7872,5791,076
Other Race1,329610156
Multiple Races1,1321,101791
Native American193193110
Islander7570

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 76.70%.

Name Average Male Female
Overall$43,596$48,990$39,426
Less Than High School$27,699$40,475$16,131
High School Grad$32,005$37,125$26,892
Some College$36,593$42,035$30,822
Bachelors Degree$46,318$51,732$42,467
Graduate Degree$61,637$66,029$60,062

$43,596

Average Earnings

$48,990

Average Male

$39,426

Average Female

Johnson County, Iowa Language

Johnson County, Iowa Language by Age

Johnson County, Iowa Language

86.68% of Johnson County, Iowa residents speak only English, while 13.32% speak other languages. The non-English language spoken by the largest group is Asian, which is spoken by 4.46% of the population.

Johnson County, Iowa Poverty

Johnson County, Iowa Poverty by Race

Name Total In Poverty Poverty Rate
White108,32015,31314.14%
Black8,6833,30038.01%
Asian8,7143,02034.66%
Hispanic7,3581,88725.65%
Other2,4481,01841.58%
Multiple3,22547714.79%
Islander1617445.96%
Native253239.09%

17.65%

Overall Poverty Rate

17.43%

Male Poverty Rate

17.87%

Female Poverty Rate

Poverty in Johnson County, Iowa

The race most likely to be in poverty in Johnson County, Iowa is Islander, with 45.96% below the poverty level.

The race least likely to be in poverty in Johnson County, Iowa is Native, with 9.09% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.94%. Among those working part-time, it was 37.50%, and for those that did not work, the poverty rate was 29.69%.

Name Poverty
Less Than High School18.67%
High School11.38%
Some College9.91%
Bachelors or Greater5.86%
Name Poverty
Male Unemployed54.07%
Female Unemployed46.68%
Female Employed15.14%
Male Employed11.56%

Johnson County, Iowa Income

Johnson County, Iowa Income by Household Type

Name Median Mean
Households$59,965$81,914
Families$89,700$110,812
Married Families$101,342$122,808
Non Families$31,752$44,608

Johnson County, Iowa Marital Status

Johnson County, Iowa Marital Status

Marriage Rates

44.7%

Overall Marriage Rate

45.8%

Male Marriage Rate

43.5%

Female Marriage Rate

Johnson County, Iowa Married by Age and Sex

Johnson County, Iowa Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Johnson County, Iowa Marital Status by Race

Johnson County, Iowa Veterans

5,399

Number of Veterans

4,833

Male Veterans

566

Female Veterans

War Veterans
Vietnam1,867
First Gulf War964
Second Gulf War937
Korea610
World War II298

Johnson County, Iowa Veterans by Race

Name Veterans % of Total
White5,2405.35%
Hispanic581.08%
2 or More502.78%
Indian4722.17%
Black360.60%
Asian260.36%

Johnson County, Iowa Veterans by Education

9.14%

Veteran Poverty Rate

20.40%

Veteran Disability Rate

Johnson County, Iowa Employment Status

71.6%

Labor Force Participation

69.2%

Employment Rate

3.3%

Unemployment Rate

Population of Cities in Johnson County, Iowa

City 2010 Census 2016 Estimated Growth Growth Rate
Iowa City679467439864529.50%
Coralville189122039714857.85%
North Liberty1339118520512938.30%
Tiffin19473006105954.39%
Solon2078258750924.49%
West Branch 23222359371.59%
Lone Tree13021388866.61%
University Heights10511089383.62%
Swisher879924455.12%
Oxford80581160.75%
Hills70280810615.10%
Shueyville5666468014.13%
  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