52133 ZIP Code — Castalia, IA

Winneshiek County, Iowa

ZIP code 52133 is located in Castalia, Iowa, within Winneshiek County. It covers approximately 43.70 square miles and serves a population of 627 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 563.

About ZIP code 52133

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 $188,600. Owner-occupancy is high at 94%, well above the national average.

Median household income is $64,872. The poverty rate of 3% is below the national average. 42% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with retail trade as the leading industry. The average commute of 24 minutes is near the national average.

College attainment at 3% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 52133 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

627

population

43.70

sq mi land

Standard

ZIP type

Central (CT)

timezone

52133 ZIP code map

Cities in ZIP code 52133

Below are the cities the US Postal Service accepts for ZIP code 52133. Using any city not on this list may result in mail delivery delays.

City	Status
Castalia	Preferred

Nearby ZIP codes

52161 Ossian (3.7 mi) 52135 Clermont (6 mi) 52162 Postville (6.3 mi) 52175 West Union (10.8 mi) 52156 Luana (12.2 mi) 52141 Elgin (12.5 mi) 52144 Fort Atkinson (14 mi) 52172 Waukon (14.8 mi) 52132 Calmar (15.1 mi) 52101 Decorah (16.4 mi) 52159 Monona (17.5 mi) 52171 Waucoma (17.7 mi)

Demographics updated 06/2026

Population
Total population	627
Population density	14 / sq mi
State FIPS	19
County FIPS	191

Geography
Land area	43.70 sq mi
Water area	0.01 sq mi
Latitude	43.1082
Longitude	-91.6828
Timezone	Central (CT)
Area code	563

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	30.4%	38.2%	40.1%
$50k – $100k	58.9%	38.1%	33.4%
$100k – $200k	7.5%	19.5%	21.5%
Over $200k	3.2%	4.2%	5.0%

Demographics & statistics

627

Population

People per sq mi

57.0

Median age

$64,872

Median household income

$31,312

Per capita income

$188,600

Median home value

$731

Median monthly rent

93.5%

Home ownership

2.9%

Poverty rate

0.0%

Unemployment

283

Housing units

2.8%

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	97	15.5%
18 and over	530	84.5%
65 and over	110	17.5%
Median age	57.0 years

Race & ethnicity

White 87.6%

Black or African American 12.4%

Group	Count	%
White	549	87.6%
Black or African American	78	12.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	30.4%	38.2%	40.1%
$50k – $100k	58.9%	38.1%	33.4%
$100k – $200k	7.5%	19.5%	21.5%
Over $200k	3.2%	4.2%	5.0%

Under $10k 1.5%

$10k–$15k 0.4%

$15k–$25k 5.7%

$25k–$35k 6.9%

$35k–$50k 16.5%

$50k–$75k 22.6%

$75k–$100k 28.0%

$100k–$150k 13.0%

$150k–$200k 0.8%

$200k+ 4.6%

Range	% of households
Under $10k	1.5%
$10k–$15k	0.4%
$15k–$25k	5.7%
$25k–$35k	6.9%
$35k–$50k	16.5%
$50k–$75k	22.6%
$75k–$100k	28.0%
$100k–$150k	13.0%
$150k–$200k	0.8%
$200k+	4.6%
Median income	$64,872

Housing

Home values

Under $50k 18.4%

$50k–$100k 22.1%

$100k–$150k 5.3%

$150k–$200k 6.1%

$200k–$300k 25.8%

$300k–$500k 7.8%

$500k–$1M 3.7%

$1M+ 10.7%

Housing overview

Metric	Value
Median home value	$188,600
Median rent / month	$731
Owner occupied	93.5%
Renter occupied	6.5%
Vacant	13.0%
Single-family detached	78.3%
Large apartment buildings	0.0%
Mobile homes	20.3%
Median rooms	6.4
Avg household size (owned)	2.45

Year built

Era	%
2020 or later	0.0%
2010–2019	1.3%
2000–2009	20.7%
1990–1999	16.3%
1980–1989	3.3%
1970–1979	2.7%
1960–1969	4.3%
1950–1959	1.7%
1940–1949	10.0%
1939 or earlier	39.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	1.3%
2 bedrooms	12.0%
3 bedrooms	47.3%
4 bedrooms	31.0%
5+ bedrooms	7.7%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	14.6%
2 vehicles	60.5%
3 or more	24.9%

Heating fuel

Fuel type	%
Utility gas	20.7%
Electricity	5.4%
Propane / LP gas	57.1%
Fuel oil	11.1%
Wood	5.7%

Households & families

Household type	Count	%
Married-couple family	183	70.1%
Cohabiting couple	5	1.9%
Male householder, no spouse	12	4.6%
Female householder, no spouse	61	23.4%
Households with children under 18	72	27.6%
Households with seniors (65+)	67	25.7%
Average household size	2.40

Marital status

Status	Male	Female
Never married	22.7%	35.1%
Married	72.3%	56.9%
Separated	0.0%	0.0%
Widowed	0.4%	4.5%
Divorced	4.6%	3.5%

Education

Less than 9th grade 0.2%

Some HS, no diploma 3.3%

HS graduate 69.1%

Some college, no degree 10.0%

Associate's degree 14.6%

Bachelor's degree 2.8%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	96.5%
Bachelor's or higher	2.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	11	11.1%
Elementary school	6	6.1%
High school	80	80.8%
College / grad school	2	2.0%

Employment

Industry of employment

Retail trade 37.8%

Manufacturing 17.1%

Education & healthcare 12.4%

Agriculture & mining 11.8%

Professional & management 7.4%

Construction 3.8%

Wholesale trade 3.5%

Transportation & utilities 2.4%

Arts, food & hospitality 2.4%

Finance & real estate 1.2%

Other services 0.3%

Occupation

Category	%
Management, business & arts	32.4%
Service	10.9%
Sales & office	10.0%
Natural resources & construction	4.4%
Production & transportation	42.2%

Employment type

Type	%
Private sector	65.8%
Government	2.1%
Self-employed	32.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	80.1%
Carpool	1.5%
Public transit	0.0%
Walk	7.7%
Work from home	10.1%
Other means	0.6%
Avg commute (minutes)	23.5

Poverty

All people 2.9%

Under 18 years 5.3%

18 and over 2.5%

Married-couple families 1.1%

Female-led households 0.0%

Income support

Source	% of households
Social Security	41.8%
Retirement income	9.6%
Supplemental Security	20.3%
Cash public assistance	0.0%
Food stamps / SNAP	3.8%

Health indicators

Condition	%
Obesity	34.7%
High blood pressure	31.8%
High cholesterol	33.9%
Diabetes	9.4%
Heart disease	6.4%
Stroke	2.8%
Asthma	9.0%
Arthritis	24.7%
Kidney disease	2.7%
Pulmonary disease	6.3%
Cancer	7.1%

Behavior / access	%
Smoking	16.1%
Binge drinking	22.9%
No physical activity	22.0%
Less than 7 hrs sleep	28.7%
Depression	16.7%
Fair or poor health	11.4%
Poor mental health	12.6%
Poor physical health	9.0%
No health insurance	8.8%
Visited doctor (checkup)	74.2%
Visited dentist	71.8%
Cholesterol screening	89.6%
Teeth loss	11.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	25	4.7%

Disability	%
Any disability	20.6%
Under 18	0.0%
18–64 years	20.5%
65 and over	39.1%

Health insurance coverage

Type	%
Private insurance	84.8%
Public insurance	31.4%
No insurance	2.2%
Uninsured under 19	4.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	590	94.1%
Spanish	2	0.3%
Other Indo-European	2	0.3%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	624	99.5%
Born in same state	624	99.5%
Born in different state	466	74.3%
Foreign born	0	0.0%
Naturalized citizen	3	0.5%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Polish	78	12.4%
Italian	26	4.1%
Irish	7	1.1%

Ancestry	Count	%
French	6	1%
Arab	1	0.2%

Technology access

Metric	% of households
Computer access	41.6%
Internet access	90.0%

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

Frequently asked questions about ZIP code 52133

What city is ZIP code 52133 in?

ZIP code 52133 is primarily assigned to Castalia, Iowa.

What county is ZIP code 52133 in?

ZIP code 52133 falls within Winneshiek County, Iowa.

How educated is the population of ZIP code 52133?

3% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is ZIP code 52133 mostly owner-occupied?

94% of occupied units in ZIP code 52133 are owner-occupied, well above the national average.

Does ZIP code 52133 have a large retiree population?

42% of households in ZIP code 52133 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 52133?

The median home value in ZIP code 52133 is $188,600.

What timezone is ZIP code 52133 in?

ZIP code 52133 observes the CST timezone.