50136 ZIP Code — Keswick, IA

Keokuk County, Iowa

ZIP code 50136 is located in Keswick, Iowa, within Keokuk County. It covers approximately 39.82 square miles and serves a population of 408 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 319.

About ZIP code 50136

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $95,000. Owner-occupancy is high at 79%, well above the national average.

Median household income is $62,625. The poverty rate of 5% is below the national average. 38% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 29 minutes is near the national average.

College attainment at 18% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 50136 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

408
population
39.82
sq mi land
Standard
ZIP type
Central (CT)
timezone
50136 ZIP code map
Cities in ZIP code 50136

Below are the cities the US Postal Service accepts for ZIP code 50136. Using any city not on this list may result in mail delivery delays.

City Status
Keswick Preferred
Nearby ZIP codes
50104 Gibson (4.7 mi) 50268 What Cheer (5.6 mi) 52222 Deep River (9.3 mi) 50027 Barnes City (10.2 mi) 52591 Sigourney (11.3 mi) 52335 South English (11.5 mi) 52316 North English (12.5 mi) 52586 Rose Hill (12.6 mi) 50171 Montezuma (15.5 mi) 52347 Victor (16.9 mi) 52251 Ladora (17.3 mi) 50207 New Sharon (17.5 mi)
Demographics updated 05/2026
Population
Total population 408
Population density 10 / sq mi
State FIPS 19
County FIPS 107
Geography
Land area 39.82 sq mi
Water area 0.01 sq mi
Latitude 41.4668
Longitude -92.2876
Timezone Central (CT)
Area code 319
Total population by age
Gender
Race & ethnicity
Economics updated 05/2026
Household income
Income range This ZIP County avg State avg
Under $50k 47.3% 45.3% 40.1%
$50k – $100k 27.7% 33.2% 33.4%
$100k – $200k 23.4% 18.6% 21.5%
Over $200k 1.6% 2.9% 5.0%

Demographics & statistics

408
Population
10
People per sq mi
48.7
Median age
$62,625
Median household income
$33,415
Per capita income
$95,000
Median home value
$921
Median monthly rent
78.6%
Home ownership
5.1%
Poverty rate
4.0%
Unemployment
160
Housing units
18.0%
Bachelor's or higher

Age distribution

Male Female
10
Under 5
8
12
5–9
11
16
10–14
14
11
15–19
9
9
20–24
8
28
25–34
25
9
35–44
8
30
45–54
26
18
55–59
15
14
60–64
12
36
65–74
32
18
75–84
15
7
85+
7
← Male
Female →

Age summary

GroupCount%
Under 188821.6%
18 and over32078.4%
65 and over11528.2%
Median age48.7 years

Race & ethnicity

White 91.3%
Two or more races 5.8%
Hispanic or Latino 1.9%
Other race 1%
GroupCount%
White38091.3%
Two or more races245.8%
Hispanic or Latino81.9%
Other race41%

Household income

Income range This ZIP County avg State avg
Under $50k 47.3% 45.3% 40.1%
$50k – $100k 27.7% 33.2% 33.4%
$100k – $200k 23.4% 18.6% 21.5%
Over $200k 1.6% 2.9% 5.0%
Under $10k 1.3%
$10k–$15k 1.3%
$15k–$25k 5.0%
$25k–$35k 10.7%
$35k–$50k 15.7%
$50k–$75k 22.0%
$75k–$100k 16.4%
$100k–$150k 13.8%
$150k–$200k 13.2%
$200k+ 0.6%
Range% of households
Under $10k1.3%
$10k–$15k1.3%
$15k–$25k5.0%
$25k–$35k10.7%
$35k–$50k15.7%
$50k–$75k22.0%
$75k–$100k16.4%
$100k–$150k13.8%
$150k–$200k13.2%
$200k+0.6%
Median income$62,625

Housing

Home values

Under $50k 12.8%
$50k–$100k 43.2%
$100k–$150k 13.6%
$150k–$200k 5.6%
$200k–$300k 16.8%
$300k–$500k 5.6%
$500k–$1M 2.4%

Housing overview

MetricValue
Median home value$95,000
Median rent / month$921
Owner occupied78.6%
Renter occupied21.4%
Vacant18.0%
Single-family detached87.6%
Large apartment buildings0.0%
Mobile homes2.1%
Median rooms6.9
Avg household size (owned)2.48

Year built

Era%
2020 or later0.0%
2010–201912.4%
2000–20095.2%
1990–19997.2%
1980–19890.0%
1970–19799.8%
1960–19696.7%
1950–19594.6%
1940–19495.2%
1939 or earlier49.0%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom2.6%
2 bedrooms23.2%
3 bedrooms38.7%
4 bedrooms28.9%
5+ bedrooms6.7%

Vehicles per household

Vehicles% of households
No vehicle1.3%
1 vehicle24.5%
2 vehicles23.3%
3 or more50.9%

Heating fuel

Fuel type%
Utility gas8.8%
Electricity17.0%
Propane / LP gas67.9%
Wood4.4%

Households & families

Household typeCount%
Married-couple family10163.5%
Cohabiting couple42.5%
Male householder, no spouse3320.8%
Female householder, no spouse2113.2%
Households with children under 184125.8%
Households with seniors (65+)6339.6%
Average household size2.57

Marital status

StatusMaleFemale
Never married25.3%11.9%
Married61.2%68.6%
Separated0.0%1.9%
Widowed1.1%5.7%
Divorced12.4%11.9%

Education

Less than 9th grade 1.0%
Some HS, no diploma 1.3%
HS graduate 44.7%
Some college, no degree 21.3%
Associate's degree 13.7%
Bachelor's degree 17.3%
Graduate / professional 0.7%
Metric%
HS diploma or higher97.7%
Bachelor's or higher18.0%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool22.3%
Kindergarten55.8%
Elementary school4451.2%
High school2427.9%
College / grad school1112.8%

Employment

Industry of employment

Education & healthcare 25.8%
Manufacturing 14.2%
Arts, food & hospitality 11.6%
Agriculture & mining 11.1%
Wholesale trade 8.9%
Professional & management 8.4%
Retail trade 5.8%
Construction 5.3%
Public administration 4.7%
Transportation & utilities 2.6%
Information 1.1%
Other services 0.5%

Occupation

Category%
Management, business & arts40.0%
Service21.6%
Sales & office18.4%
Natural resources & construction14.2%
Production & transportation5.8%

Employment type

Type%
Private sector81.1%
Government16.3%
Self-employed2.6%
Unpaid family workers0.0%

Commute

Method%
Drive alone87.8%
Carpool6.4%
Public transit0.0%
Walk3.2%
Work from home2.7%
Other means0.0%
Avg commute (minutes)28.7

Poverty

All people 5.1%
Under 18 years 2.3%
18 and over 5.9%
Married-couple families 5.9%
Female-led households 11.1%

Income support

Source% of households
Social Security37.7%
Retirement income19.5%
Supplemental Security3.1%
Cash public assistance8.8%
Food stamps / SNAP8.2%

Health indicators

Condition%
Obesity39.4%
High blood pressure38.9%
High cholesterol36.5%
Diabetes11.9%
Heart disease8.4%
Stroke4.0%
Asthma9.8%
Arthritis29.3%
Kidney disease3.5%
Pulmonary disease8.9%
Cancer8.0%
Behavior / access%
Smoking19.9%
Binge drinking20.5%
No physical activity29.7%
Less than 7 hrs sleep32.2%
Depression18.4%
Fair or poor health16.1%
Poor mental health13.9%
Poor physical health11.8%
No health insurance10.3%
Visited doctor (checkup)76.3%
Visited dentist61.9%
Cholesterol screening87.9%
Teeth loss16.8%

Veterans & disability

VeteransCount%
Civilian veterans3210.0%
Disability%
Any disability15.9%
Under 1819.3%
18–64 years5.4%
65 and over32.2%

Health insurance coverage

Type%
Private insurance72.3%
Public insurance48.3%
No insurance4.9%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only39095.6%
Spanish61.5%
Other Indo-European61.5%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)40098.0%
Born in same state40098.0%
Born in different state32980.6%
Foreign born00.0%
Naturalized citizen82.0%
Not a US citizen112.5%

Ancestry

AncestryCount%
French6014.7%
Italian4410.8%
English256.1%
AncestryCount%
Arab122.9%
Polish102.5%

Technology access

Metric% of households
Computer access39.0%
Internet access94.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 50136

What city is ZIP code 50136 in?

ZIP code 50136 is primarily assigned to Keswick, Iowa.

What county is ZIP code 50136 in?

ZIP code 50136 falls within Keokuk County, Iowa.

Does ZIP code 50136 have an older population?

28% of residents in ZIP code 50136 are 65 or older, above the national average of ~17%.

Does ZIP code 50136 have a large retiree population?

38% of households in ZIP code 50136 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 50136?

The median home value in ZIP code 50136 is $95,000.

Does ZIP code 50136 have a large veteran population?

10% of civilians in ZIP code 50136 are veterans, above the national average of ~7%.

What timezone is ZIP code 50136 in?

ZIP code 50136 observes the CST timezone.

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