Johnson County, Iowa's estimated 2023 population is 159,445 with a growth rate of 1.4% in the past year according to the most recent United States census data. Johnson County, Iowa is the 4th largest county in Iowa. The 2010 population was 130,882 and has seen a growth of 21.82% since that time.
White
Black or African American
Asian
Two or more races
Other race
Native American
Native Hawaiian or Pacific Islander
2.97
Average Family Size
2.37
Average Household Size
58.6%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among islander people with a rate of 87.72%.
The highest rate of bachelors degrees is among asian people with a rate of 49.87%.
All
Male
Female
$46,081
Average Earnings
$51,473
Average Male
$40,196
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
84.6% of Johnson County, Iowa residents speak only English, while 15.4% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 5.46% of the population.
rate
19.64%
Overall Poverty Rate
16.91%
Male Poverty Rate
17.49%
Female Poverty Rate
The race most likely to be in poverty in Johnson County, Iowa is Islander, with 87.72% below the poverty level.
The race least likely to be in poverty in Johnson County, Iowa is White, with 16.77% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.82%. Among those working part-time, it was 35.05%, and for those that did not work, the poverty rate was 27.02%.
rate
rate
Households
Families
MarriedFamilies
NonFamilies
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
45.1%
Overall Marriage Rate
45.8%
Male Marriage Rate
44.5%
Female Marriage Rate
male
female
The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
5,006
Number of Veterans
4,586
Male Veterans
420
Female Veterans
count
count
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
8.9%
Veteran Poverty Rate
18.35%
Veteran Disability Rate
LaborForceParticipation
70.1%
Labor Force Participation
67.4%
Employment Rate
3.7%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
55.25%
Born in Johnson County, Iowa
87.26%
Native Born
11.41%
Foreign Born
7.87%
Non Citizen
3.54%
Naturalized
87.26% of Johnson County, Iowa residents were born in the United States, with 55.25% having been born in Iowa. 7.87% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.