Hamilton County, Iowa Population 2021

Hamilton County, Iowa's estimated population is 14,547 with a growth rate of -0.77% in the past year according to the most recent United States census data. Hamilton County, Iowa is the 54th largest county inIowa. The 2010 Population was 15,633 and has seen a growth of -6.95% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202114,547-113-0.77%
202014,660-113-0.76%
201914,773-113-0.76%
201814,886-146-0.97%
201715,032-43-0.29%
201615,075-143-0.94%
201515,21810.01%
201415,217-126-0.82%
201315,343220.14%
201215,321-146-0.94%
201115,467-166-1.06%
201015,633-438-2.73%
199016,071-1,791-10.03%
198017,862-521-2.83%
197018,383-1,649-8.23%
196020,0323721.89%
195019,660-262-1.32%
194019,922-1,056-5.03%
193020,9781,4477.41%
192019,5312891.50%
191019,242-272-1.39%
190019,5144,19527.38%
189015,3194,06736.14%
188011,2525,19785.83%
18706,0554,356256.39%
18601,6990.00%
2021 Growth Rate
-0.77% (-113)
County Website
State
Founded
1856
County Seat
2010 Population
15,633
Growth Since 2010
-6.95% (-1,086)
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Hamilton County, Iowa Population Growth

Population by Race

Race Population Percentage
White14,07793.87%
Asian4553.03%
Black or African American2021.35%
Some Other Race2011.34%
Native Hawaiian and Other Pacific Islander320.21%
Two or More Races220.15%
American Indian and Alaska Native80.05%
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Hamilton County, Iowa Population by Race

Hamilton County, Iowa Population Pyramid $2021

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Hamilton County, Iowa Median Age

42.6


Total

41.5


Male

44.3


Female

Hamilton County, Iowa Adults

There are 11,564 adults, (3,024 of whom are seniors) in Hamilton County, Iowa.

Hamilton County, Iowa Age Dependency

75.6

Age Dependency Ratio

35.4

Old Age Dependency Ratio

40.2

Child Dependency Ratio

Hamilton County, Iowa Sex Ratio

Female

7,621

50.82%

Male

7,376

49.18%

Hamilton County, Iowa Population by Age

Hamilton County, Iowa Renter vs Owner Occupied by Household Type

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Hamilton County, Iowa Household Types

Type Owner Renter
Non Family54.6%45.4%
Male58.7%41.3%
Female61.6%38.4%
All72.4%27.6%
Married86.1%13.9%

72.4%

Rate of Home Ownership

Hamilton County, Iowa Households and Families

Type Count Average Size Owned
All6,2592.3672.4
Married3,3822.9986.1
Non Family2,1271.1454.6
Female4982.8961.6
Male2523.2558.7

2.95

Average Family Size

2.36

Average Household Size

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Hamilton County, Iowa Households by Type

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Education Attained Count Percentage
Less Than 9th Grade3072.91%
9th to 12th Grade4023.81%
High School Graduate3,41632.38%
Some College2,12920.18%
Associates Degree1,73016.40%
Bachelors Degree1,93518.34%
Graduate Degree6315.98%
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Hamilton County, Iowa Educational Attainment by Sex (over 25)

Hamilton County, Iowa Educational Attainment by Race

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Race Total High School Bachelors
White9,7159,3162,423
Hispanic45817359
Asian25423541
Other Race118366
Black79739
Islander323232
2+ Races882
Native American55

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 islander people with a rate of 100.00%.

Hamilton County, Iowa Educational Attainment by Race

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Name Average Male Female
Overall$41,570$48,624$32,462
Less Than 9th Grade$36,875$47,396$14,265
High School Graduate$32,063$40,274$25,962
Some College$43,145$50,341$35,114
Bachelors Degree$51,875$58,779$39,744
Graduate Degree$73,209$96,346$69,926

$41,570

Average Earnings

$48,624

Average Male

$32,462

Average Female

Hamilton County, Iowa Earnings by Educational Attainment

Hamilton County, Iowa Language by Age

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Hamilton County, Iowa Language

92.02% of Hamilton County, Iowa residents speak only English, while 7.98% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 5.31% of the population.

Hamilton County, Iowa Language

Hamilton County, Iowa Poverty by Race

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Name Total In Poverty Poverty Rate
White13,1889427.14%
Asian45518440.44%
Black19416886.60%
Hispanic90414616.15%
Other20113165.17%
Multiple22940.91%
Native8337.50%

9.81%

Overall Poverty Rate

8.62%

Male Poverty Rate

10.96%

Female Poverty Rate

Poverty in Hamilton County, Iowa

The race most likely to be in poverty in Hamilton County, Iowa is Black, with 86.60% below the poverty level.

The race least likely to be in poverty in Hamilton County, Iowa is White, with 7.14% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.81%. Among those working part-time, it was 15.59%, and for those that did not work, the poverty rate was 18.05%.

Hamilton County, Iowa Poverty

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Name Poverty
Less Than 9th Grade26.36%
High School13.04%
Some College6.58%
Bachelors or Greater2.80%

Hamilton County, Iowa Poverty Rate by Education

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Rate Poverty
Female Unemployed66.00%
Male Unemployed42.86%
Female Employed4.82%
Male Employed2.67%

Hamilton County, Iowa Poverty Rate by Employment Status and Sex

Hamilton County, Iowa Income by Household Type

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Name Median Mean
Households$60,910$71,567
Families$75,203$85,854
Married Families$83,571-
Non Families$32,277$41,274
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Income by Household Type

Hamilton County, Iowa Marital Status

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Marriage Rates

57.6%

Overall Marriage Rate

57.7%

Male Marriage Rate

57.5%

Female Marriage Rate

Hamilton County, Iowa Married by Age and Sex

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Hamilton 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 45-54.

Hamilton County, Iowa Marital Status by Race

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Hamilton County, Iowa Marital Status

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895

Number of Veterans

813

Male Veterans

82

Female Veterans

War Veterans
Vietnam325
Second Gulf War153
First Gulf War132
Korea109
World War II47

Hamilton County, Iowa Veterans by War

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Age Group Veterans
75+273
65 to 74250
35 to 54226
55 to 6494
18 to 3452

Hamilton County, Iowa Veterans by Age

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Name Veterans % of Total
White8908.08%
Asian51.85%

Hamilton County, Iowa Veterans by Race

Hamilton County, Iowa Veterans by Education

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5.73%

Veteran Poverty Rate

24.63%

Veteran Disability Rate

Hamilton County, Iowa Veterans by Education

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63.8%

Labor Force Participation

62%

Employment Rate

2.7%

Unemployment Rate

Hamilton County, Iowa Employment by Age

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Hamilton County, Iowa Employment by Race

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Hamilton County, Iowa Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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77.24%

Born in Hamilton County, Iowa

95.61%

Native Born

4.39%

Foreign Born

2.08%

Non Citizen

2.31%

Naturalized

Place of Birth

95.61% of Hamilton County, Iowa residents were born in the United States, with 77.24% having been born in Iowa. 2.08% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Hamilton County, Iowa Place of Birth

  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

Sources