Keswick ZIP Codes — Keokuk County, IA

There is one unique ZIP code in Keswick, Iowa and it is 50136. Area code: 319.

ZIP codes

39.82

sq mi land

0.01

sq mi water

319

area code

Keswick, IA ZIP code map

About Keswick, IA

Keswick is a small city located in Keokuk County, Iowa. Known for its quiet atmosphere, it offers a close-knit community environment for its residents. The city's charm lies in its simplicity and the beautiful landscapes that surround it.

Location & geography

Situated in the southeastern part of Iowa, Keswick is conveniently located near several other towns and cities. The nearest larger cities include Oskaloosa, approximately 18 miles to the northwest, and Sigourney, about 15 miles to the east. Covering a total land area of 39.82 square miles, Keswick also features a minimal water area of 0.01 square miles, highlighting the predominantly land-based scenery.

Community & economy

The character of Keswick is defined by its friendly residents and community-oriented activities. Agriculture and local businesses play a significant role in the local economy, reflecting the area's rural roots. Daily life in Keswick typically revolves around community events, interaction with neighbors, and a connection to nature.

Transportation

Keswick is accessible via local roads, with nearby highways providing connections to surrounding areas. The nearest major highway is U.S. Route 63, which facilitates travel to neighboring cities. For air travel, the closest significant airport is located in the nearby city of Oskaloosa.

History

Keswick was founded in the late 19th century and has since developed a rich agricultural foundation that has shaped its identity. Historically, the community has been active in local farming, which continues to be a crucial part of its economy today. Notable events in Keswick's history often center around community gatherings and local celebrations pertaining to harvests.

Did you know?

One surprising fact about Keswick is that it has only one ZIP code, 50136, which underscores the small-town nature of the city. Additionally, it is known for its picturesque landscapes, which are characteristic of eastern Iowa's rural charm.

ZIP codes for Keswick, IA (1)

ZIP code	City	County	Map
50136	Keswick	Keokuk	View map

Demographics & statistics

408

Population

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

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	88	21.6%
18 and over	320	78.4%
65 and over	115	28.2%
Median age	48.7 years

Race & ethnicity

White 91.3%

Two or more races 5.8%

Hispanic or Latino 1.9%

Other race 1%

Group	Count	%
White	380	91.3%
Two or more races	24	5.8%
Hispanic or Latino	8	1.9%
Other race	4	1%

Household income

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 $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%
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

Metric	Value
Median home value	$95,000
Median rent / month	$921
Owner occupied	78.6%
Renter occupied	21.4%
Vacant	18.0%
Single-family detached	87.6%
Large apartment buildings	0.0%
Mobile homes	2.1%
Median rooms	6.9
Avg household size (owned)	2.48

Year built

Era	%
2020 or later	0.0%
2010–2019	12.4%
2000–2009	5.2%
1990–1999	7.2%
1980–1989	0.0%
1970–1979	9.8%
1960–1969	6.7%
1950–1959	4.6%
1940–1949	5.2%
1939 or earlier	49.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	2.6%
2 bedrooms	23.2%
3 bedrooms	38.7%
4 bedrooms	28.9%
5+ bedrooms	6.7%

Vehicles per household

Vehicles	% of households
No vehicle	1.3%
1 vehicle	24.5%
2 vehicles	23.3%
3 or more	50.9%

Heating fuel

Fuel type	%
Utility gas	8.8%
Electricity	17.0%
Propane / LP gas	67.9%
Wood	4.4%

Households & families

Household type	Count	%
Married-couple family	101	63.5%
Cohabiting couple	4	2.5%
Male householder, no spouse	33	20.8%
Female householder, no spouse	21	13.2%
Households with children under 18	41	25.8%
Households with seniors (65+)	63	39.6%
Average household size	2.57

Marital status

Status	Male	Female
Never married	25.3%	11.9%
Married	61.2%	68.6%
Separated	0.0%	1.9%
Widowed	1.1%	5.7%
Divorced	12.4%	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 higher	97.7%
Bachelor's or higher	18.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	2	2.3%
Kindergarten	5	5.8%
Elementary school	44	51.2%
High school	24	27.9%
College / grad school	11	12.8%

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 & arts	40.0%
Service	21.6%
Sales & office	18.4%
Natural resources & construction	14.2%
Production & transportation	5.8%

Employment type

Type	%
Private sector	81.1%
Government	16.3%
Self-employed	2.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	87.8%
Carpool	6.4%
Public transit	0.0%
Walk	3.2%
Other means	0.0%
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 Security	37.7%
Retirement income	19.5%
Supplemental Security	3.1%
Cash public assistance	8.8%
Food stamps / SNAP	8.2%

Health indicators

Condition	%
High blood pressure	38.9%
High cholesterol	36.5%
Heart disease	8.4%
Stroke	4.0%
Asthma	9.8%
Arthritis	29.3%
Kidney disease	3.5%
Pulmonary disease	8.9%
Cancer	8.0%

Behavior / access	%
Binge drinking	20.5%
No physical activity	29.7%
Less than 7 hrs sleep	32.2%
Fair or poor health	16.1%
Poor mental health	13.9%
Poor physical health	11.8%
No health insurance	10.3%
Visited doctor (checkup)	76.3%
Visited dentist	61.9%
Cholesterol screening	87.9%
Teeth loss	16.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	32	10.0%

Disability	%
Any disability	15.9%
Under 18	19.3%
18–64 years	5.4%
65 and over	32.2%

Health insurance coverage

Type	%
Private insurance	72.3%
Public insurance	48.3%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	390	95.6%
Spanish	6	1.5%
Other Indo-European	6	1.5%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	400	98.0%
Born in same state	400	98.0%
Born in different state	329	80.6%
Foreign born	0	0.0%
Naturalized citizen	8	2.0%
Not a US citizen	1	12.5%

Ancestry

Ancestry	Count	%
French	60	14.7%
Italian	44	10.8%
English	25	6.1%

Ancestry	Count	%
Arab	12	2.9%
Polish	10	2.5%

Technology access

Metric	% of households
Computer access	39.0%
Internet access	94.3%

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

Frequently asked questions

What ZIP codes does Keswick, IA have?

Keswick, IA has one ZIP code: 50136. Each ZIP code serves a distinct delivery area within the city and surrounding region.