Underwood, IA demographics:
population, income, and more

Total population
898
-8.1% year-over-year change
Median household income
$105,341/yr
16.3% year-over-year change
Housing units
332
-8.5% year-over-year change

Underwood population

How many people live in Underwood

Underwood is home to 898 residents, according to the most recent Census data. Gender-wise, 44.9% of Underwood locals are male, and 55.1% are female.

Total population
898
-8.1% year-over-year change
Gender ratio
Male
44.9%
403
Female
55.1%
495
Value Percent YoY change
Male 403 44.9% -14.3%
Female 495 55.1% -2.4%
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 Underwood is 34, with the population distributed as follows: about 27% are children under 15, then 13.4% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.4% of the population, while another 23.4% fall into the 45 to 64 bracket. Finally, around 10.9% are 65 or older.

Median age
33.5
Age breakdown
Under 15
27%
15 to 24
13.4%
25 to 44
25.4%
45 to 64
23.4%
Over 65
10.9%
Value Percent YoY change
Under 15 242 27% -0.4%
15 to 24 120 13.4% -27.7%
25 to 44 228 25.4% -16.5%
45 to 64 210 23.4% 6.1%
Over 65 98 10.9% 1.0%
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 Underwood, 98% of the population are US-born citizens, while 2% have gained naturalized citizenship. There’s also a share of 2.2% that includes residents with two or more races.

Citizenship
U.S.-born citizens
98%
Non-U.S.-born citizens
2%
Non-citizens
0%
Value Percent YoY change
U.S.-born citizens 880 98% -6.9%
Non-U.S.-born citizens 18 2% -5.3%
Racial breakdown
White
96.1%
Black or African American
0%
American Indian and Alaska Native
0.3%
Asian
1.3%
Native Hawaiian and other Pacific Islander
0%
Two or more races
2.2%
Other
0%
Value Percent
White 863 96.1%
American Indian and Alaska Native 3 0.3%
Asian 12 1.3%
Two or more races 20 2.2%

Households in Underwood

A peek inside Underwood households

Underwood has 315 households, with an average of 3 members in each. Of these, 70.5% are families, while the remaining 29.5% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
315
-9.5% year-over-year change
Average people per household
3
Non-family households
93
Family households
222
Value Percent YoY change
Non-family households 93 29.5% -8.8%
Family households 222 70.5% -9.8%
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 Underwood

The housing landscape of Underwood

Underwood's housing consists of 332 units, with 90.1% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.5% and offer a more compact, shared living style.

Housing units
332
-8.5% year-over-year change
Housing types
Value Percent
1 unit, detached 299 90.1%
1 unit, attached 5 1.5%
2 units 1 0.3%
3 or 4 units 2 0.6%
5 to 9 units 21 6.3%
10 to 19 units 4 1.2%
Homes built since 2020
4
100.0% year-over-year change

The age of buildings in Underwood

In Underwood, the median construction year is 1978. About 14.5% of homes were built before the 1940s, with another 0.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 20.2% of homes were added from 2000 to 2009, 3% between 2010 and 2019, and 1.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 48 14.5% -25.0%
Built between 1940 and 1949 1 0.3% 0.0%
Built between 1950 and 1959 13 3.9% 116.7%
Built between 1960 and 1969 27 8.1% -18.2%
Built between 1970 and 1979 95 28.6% 20.2%
Built between 1980 and 1989 25 7.5% -19.4%
Built between 1990 and 1999 42 12.6% -10.6%
Built between 2000 and 2009 67 20.2% -23.0%
Built between 2010 and 2019 10 3% -23.1%
Built in 2020 or later 4 1.2% 100.0%
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.

Underwood occupancy rates

Out of the 315 occupied housing units in Underwood, 83.5% are owner-occupied, while 16.5% are lived in by tenants. Meanwhile, 5.1% of all homes on the local market sit vacant.

Occupied housing units
315
-9.5% year-over-year change
Occupancy breakdown
Renter occupied
52
Owner occupied
263
Value Percent YoY
change
Renter occupied 52 16.5% -22.4%
Owner occupied 263 83.5% -6.4%
Unoccupied housing units
5.1%
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.

Underwood housing costs

Housing costs in Underwood come to a median of $1,144 per month, while tenants specifically pay a median gross rent of $1,063.

Median housing costs per month
$1,144/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 Underwood
$1,063/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 Underwood

Underwood education at a glance

About 24.1% of the population in Underwood went to high school, while 31.9% pursued college studies. Another 10.2% earned an associate degree and 19.2% hold a bachelor’s. Meanwhile, 13.2% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 9 1.5% 50.0%
High school diploma 142 24.1% -7.2%
College diploma 188 31.9% -10.1%
Associate degree 60 10.2% -35.5%
Bachelor's degree 113 19.2% -8.1%
Graduate degree 78 13.2% 2.6%
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 Underwood

How much people earn in Underwood

The average annual household income in Underwood was $115,335 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +7.5% change from the previous year. At the same time, the median income stood at $105,341, reflecting a +16.3% shift over the same period.

Average household income in Underwood
$115,335/year
7.5% year-over-year change
Median household income in Underwood
$105,341/year
16.3% year-over-year change

Underwood income by age

In Underwood, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $101,875. Those with someone between 45 and 64 in charge, often well established professionally, earn $115,833 overall. Overall, 96.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $101,875 18.1%
45 - 64 $115,833 1.3%
Over 65 $54,375 -8.4%
Above poverty level
834
Below poverty level
29
Value Percent YoY
change
Above poverty level 834 96.6% -8.7%
Below poverty level 29 3.4% 20.8%

Average renter income in Underwood

To get a better sense of what renters earn on average in Underwood, their median household income was $49,375 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 25.8%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$49,375
Rent-to-income ratio
25.8%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Underwood

Workforce and job types in Underwood

The job market in Underwood is powered by 477 working residents, spread across a range of industries and roles. 78.6% of the working population are employed in professional or administrative positions, while 21.4% are in hands-on or service-based jobs. Also, 10.3% run their own businesses, 57.4% are employed by private companies, and 21.2% work in the public sector.

Workforce demographics

Working population
477
-10.2% year-over-year change
White collar
375
Blue collar
102
Value Percent YoY change
White collar 375 78.6% -8.5%
Blue collar 102 21.4% -15.7%
Employer type
Self employees
10.3%
Private companies
57.4%
Governmental workers
21.2%
Not for profit companies
11.1%
Value Percent YoY change
Self employees 49 10.3% 58.1%
Private companies 274 57.4% -18.0%
Governmental workers 101 21.2% -26.3%
Not for profit companies 53 11.1% 82.8%

Transportation in Underwood

How people get around in Underwood

Commuting methods vary: 82.8% of residents travel by personal vehicle and 4.2% 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 395 82.8% -12.2%
Motorcycle 3 0.6% 50.0%
Walk 20 4.2% -23.1%
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 Underwood by zipcode?

Zipcode Population Number of households Median income Average income
51576 1,769 650 $110,476 $127,210

Explore more communities

FAQs about Underwood demographics 

What is the total population of Underwood?

Underwood has a total population of 898 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 -8.1% compared to a year ago.

What is the gender ratio in Underwood?

The gender ratio in Underwood is as follows:
  • 44.9% males (403 residents)
  • 55.1% females (495 residents)

What is the median age in Underwood?

The median age in Underwood is 33.5.

What is the age distribution of the population in Underwood?

The age distribution in Underwood is as follows:
  • Under 15: 27% (242 residents)
  • Ages 15-24: 13.4% (120 residents)
  • Ages 25-44: 25.4% (228 residents)
  • Ages 45-64: 23.4% (210 residents)
  • Over 65: 10.9% (98 residents)

What is the racial and ethnic makeup of Underwood?

The racial and ethnic makeup of Underwood is as follows:
  • White: 96.1% (863 residents)
  • Black or African American: 0% (0 residents)
  • American Indian and Alaska Native: 0.3% (3 residents)
  • Asian: 1.3% (12 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 2.2% (20 residents)
  • Other: 0% (0 residents)

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

U.S.-born citizens represent 98% of the population in Underwood.

How many housing units are there in Underwood?

There are 332 housing units in Underwood, reflecting a -8.5% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Underwood has a total of 315 households, with an average of 3 people in each.

What is the median household income in Underwood?

Underwood has a median household income of $105,341, representing a +16.3% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Underwood?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 78.6% (375 residents)
  • Blue-collar workers: 21.4% (102 residents)

Places of employment:
  • Self-employed: 10.3% (49 residents)
  • Private companies: 57.4% (274 residents)
  • Governmental workers: 21.2% (101 residents)
  • Not-for-profit companies: 11.1% (53 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