Hamilton County, IA demographics:
population, income, and more

Total population
14,886
-0.1% year-over-year change
Median household income
$72,432/yr
0.9% year-over-year change
Housing units
7,040
-0.2% year-over-year change

Hamilton County population

How many people live in Hamilton County

Hamilton County is home to 14,886 residents, according to the most recent Census data. Gender-wise, 51.5% of Hamilton County locals are male, and 48.5% are female.

Total population
14,886
-0.1% year-over-year change
Gender ratio
Male
51.5%
7,666
Female
48.5%
7,220
Value Percent YoY change
Male 7,666 51.5% 1.7%
Female 7,220 48.5% -1.9%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Hamilton County is 42, with the population distributed as follows: about 19.6% are children under 15, then 10.9% are in the 15 to 24 age group. Adults between 25 and 44 make up 23.3% of the population, while another 25% fall into the 45 to 64 bracket. Finally, around 21.2% are 65 or older.

Median age
41.7
Age breakdown
Under 15
19.6%
15 to 24
10.9%
25 to 44
23.3%
45 to 64
25%
Over 65
21.2%
Value Percent YoY change
Under 15 2,922 19.6% 0.7%
15 to 24 1,625 10.9% 6.1%
25 to 44 3,465 23.3% -2.6%
45 to 64 3,717 25% -0.6%
Over 65 3,157 21.2% -0.3%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Hamilton County, 92% of the population are US-born citizens, while 2.9% have gained naturalized citizenship. At the same time, 5.1% of residents are non-citizens. As for race, 86.5% of locals are Caucasian, 1% are African American and 2.3% have Asian roots. Another 0.3% are Indigenous American, 0.1% are Pacific Islanders, while 2.3% identify as another race. There’s also a share of 7.5% that includes residents with two or more races.

Citizenship
U.S.-born citizens
92%
Non-U.S.-born citizens
2.9%
Non-citizens
5.1%
Value Percent YoY change
U.S.-born citizens 13,697 92% -0.4%
Non-U.S.-born citizens 433 2.9% 8.0%
Non-citizens 756 5.1% 1.3%
Racial breakdown
White
86.5%
Black or African American
1%
American Indian and Alaska Native
0.3%
Asian
2.3%
Native Hawaiian and other Pacific Islander
0.1%
Two or more races
7.5%
Other
2.3%
Value Percent
White 12,870 86.5%
Black or African American 144 1%
American Indian and Alaska Native 49 0.3%
Asian 338 2.3%
Native Hawaiian and other Pacific Islander 21 0.1%
Two or more races 1,117 7.5%
Other 347 2.3%

Households in Hamilton County

A peek inside Hamilton County households

Hamilton County has 6,434 households, with an average of 2 members in each. Of these, 61.3% are families, while the remaining 38.7% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
6,434
1.9% year-over-year change
Average people per household
2
Non-family households
2,492
Family households
3,942
Value Percent YoY change
Non-family households 2,492 38.7% 1.2%
Family households 3,942 61.3% 2.3%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Hamilton County

The housing landscape of Hamilton County

Hamilton County's housing consists of 7,040 units, with 80.7% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2.4% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 1.6% of the housing landscape.

Housing units
7,040
-0.2% year-over-year change
Housing types
Value Percent
1 unit, detached 5,682 80.7%
1 unit, attached 172 2.4%
2 units 101 1.4%
3 or 4 units 320 4.6%
5 to 9 units 218 3.1%
10 to 19 units 145 2.1%
20 to 49 units 218 3.1%
50 or more units 71 1%
Mobile home 113 1.6%
Homes built since 2020
52
73.3% year-over-year change

The age of buildings in Hamilton County

In Hamilton County, the median construction year is 1953. About 41.3% of homes were built before the 1940s, with another 5.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 5.9% of homes were added from 2000 to 2009, 1.7% between 2010 and 2019, and 0.7% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 2,909 41.3% 3.4%
Built between 1940 and 1949 370 5.3% 8.5%
Built between 1950 and 1959 791 11.2% 2.7%
Built between 1960 and 1969 541 7.7% 6.7%
Built between 1970 and 1979 963 13.7% -8.8%
Built between 1980 and 1989 378 5.4% 12.8%
Built between 1990 and 1999 500 7.1% -28.8%
Built between 2000 and 2009 417 5.9% 6.4%
Built between 2010 and 2019 119 1.7% 8.2%
Built in 2020 or later 52 0.7% 73.3%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Hamilton County occupancy rates

Out of the 6,434 occupied housing units in Hamilton County, 73.4% are owner-occupied, while 26.6% are lived in by tenants. Meanwhile, 8.6% of all homes on the local market sit vacant.

Occupied housing units
6,434
1.9% year-over-year change
Occupancy breakdown
Renter occupied
1,713
Owner occupied
4,721
Value Percent YoY
change
Renter occupied 1,713 26.6% 3.3%
Owner occupied 4,721 73.4% 1.3%
Unoccupied housing units
8.6%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Hamilton County housing costs

Housing costs in Hamilton County come to a median of $902 per month, while tenants specifically pay a median gross rent of $877.

Median housing costs per month
$902/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Hamilton County
$877/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Hamilton County

Hamilton County education at a glance

About 35.7% of the population in Hamilton County went to high school, while 24% pursued college studies. Another 17.5% earned an associate degree and 15.4% hold a bachelor’s. Meanwhile, 6.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 144 1.3% -50.5%
High school diploma 4,050 35.7% -5.3%
College diploma 2,716 24% 0.2%
Associate degree 1,985 17.5% 15.2%
Bachelor's degree 1,749 15.4% -2.0%
Graduate degree 695 6.1% 11.7%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Hamilton County

How much people earn in Hamilton County

The average annual household income in Hamilton County was $92,073 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4% change from the previous year. At the same time, the median income stood at $72,432, reflecting a +1% shift over the same period.

Average household income in Hamilton County
$92,073/year
4.0% year-over-year change
Median household income in Hamilton County
$72,432/year
0.9% year-over-year change

Hamilton County income by age

In Hamilton County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $92,188. Those with someone between 45 and 64 in charge, often well established professionally, earn $91,906 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $59,712, while those led by someone over 65, many of whom may be retired, have about $45,833 in earnings. Overall, 92.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $59,712 -25.4%
25 - 44 $92,188 12.0%
45 - 64 $91,906 0.8%
Over 65 $45,833 6.1%
Above poverty level
13,478
Below poverty level
1,084
Value Percent YoY
change
Above poverty level 13,478 92.6% 1.0%
Below poverty level 1,084 7.4% -6.6%

Employment in Hamilton County

Workforce and job types in Hamilton County

The job market in Hamilton County is powered by 7,339 working residents, spread across a range of industries and roles. 69.9% of the working population are employed in professional or administrative positions, while 30.1% are in hands-on or service-based jobs. Also, 10.6% run their own businesses, 67.6% are employed by private companies, and 14.3% work in the public sector.

Workforce demographics

Working population
7,339
2.6% year-over-year change
White collar
5,127
Blue collar
2,212
Value Percent YoY change
White collar 5,127 69.9% 0.8%
Blue collar 2,212 30.1% 6.8%
Employer type
Self employees
10.6%
Private companies
67.6%
Governmental workers
14.3%
Not for profit companies
7.6%
Value Percent YoY change
Self employees 774 10.6% -0.4%
Private companies 4,962 67.6% 6.2%
Governmental workers 1,047 14.3% -14.3%
Not for profit companies 556 7.6% 14.6%
Unemployment rate
4.8%
27.2% year-over-year change

Available workforce

The unemployment rate in Hamilton County stands at 4.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Hamilton County

How people get around in Hamilton County

Commuting methods vary: 90.6% of residents travel by personal vehicle and 2.6% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 6,597 90.6% 3.5%
Taxicab 6 0.1% 0.0%
Bus or trolleybus 7 0.1% -12.5%
Motorcycle 6 0.1% -45.5%
Bicycle 13 0.2% 30.0%
Walk 191 2.6% -20.4%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Hamilton County by zipcode?

Zipcode Population Number of households Median income Average income
50034 328 126 $76,250 $93,529
50075 807 286 $81,250 $103,491
50130 1,468 731 $78,594 $105,525
50132 427 196 $83,056 $112,935
50230 1,145 468 $87,778 $91,663
50231 142 61 $72,321 $89,531
50246 614 282 $61,324 $83,295
50248 4,216 1,721 $100,864 $116,871
50249 1,312 610 $60,761 $79,595
50271 581 289 $82,656 $121,634

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FAQs about Hamilton County demographics 

What is the total population of Hamilton County?

Hamilton County has a total population of 14,886 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.1% compared to a year ago.

What is the gender ratio in Hamilton County?

The gender ratio in Hamilton County is as follows:
  • 51.5% males (7,666 residents)
  • 48.5% females (7,220 residents)

What is the median age in Hamilton County?

The median age in Hamilton County is 41.7.

What is the age distribution of the population in Hamilton County?

The age distribution in Hamilton County is as follows:
  • Under 15: 19.6% (2,922 residents)
  • Ages 15-24: 10.9% (1,625 residents)
  • Ages 25-44: 23.3% (3,465 residents)
  • Ages 45-64: 25% (3,717 residents)
  • Over 65: 21.2% (3,157 residents)

What is the racial and ethnic makeup of Hamilton County?

The racial and ethnic makeup of Hamilton County is as follows:
  • White: 86.5% (12,870 residents)
  • Black or African American: 1% (144 residents)
  • American Indian and Alaska Native: 0.3% (49 residents)
  • Asian: 2.3% (338 residents)
  • Native Hawaiian and Other Pacific Islander: 0.1% (21 residents)
  • Two or More Races: 7.5% (1,117 residents)
  • Other: 2.3% (347 residents)

What percentage of the population in Hamilton County are U.S.-born citizens?

U.S.-born citizens represent 92% of the population in Hamilton County.

How many housing units are there in Hamilton County?

There are 7,040 housing units in Hamilton County, reflecting a -0.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Hamilton County and what is the average household size?

Hamilton County has a total of 6,434 households, with an average of 2 people in each.

What is the median household income in Hamilton County?

Hamilton County has a median household income of $72,432, representing a +0.9% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Hamilton County?

The employment rate is 95.2% in Hamilton County, with a workforce of 7,339 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 69.9% (5,127 residents)
  • Blue-collar workers: 30.1% (2,212 residents)

Places of employment:
  • Self-employed: 10.6% (774 residents)
  • Private companies: 67.6% (4,962 residents)
  • Governmental workers: 14.3% (1,047 residents)
  • Not-for-profit companies: 7.6% (556 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025