50565 ZIP Code — Marathon, IA

Buena Vista County, Iowa

ZIP code 50565 is located in Marathon, Iowa, within Buena Vista County. It covers approximately 43.51 square miles and serves a population of 381 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 50565

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 $59,100. Owner-occupancy is high at 92%, well above the national average.

Median household income is $56,667. 31% of households receive Social Security income, suggesting a notable retiree or disability population.

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

Educational attainment is near the national average, with 22% of residents holding a bachelor's degree or higher.

Overall, ZIP code 50565 reflects a community defined by high homeownership and a significant Social Security-dependent population.

381

population

43.51

sq mi land

Standard

ZIP type

Central (CT)

timezone

50565 ZIP code map

Cities in ZIP code 50565

Below are the cities the US Postal Service accepts for ZIP code 50565. Using any city not on this list may result in mail delivery delays.

City	Status
Marathon	Preferred

Nearby ZIP codes

50510 Albert City (7.1 mi) 51366 Webb (7.5 mi) 50554 Laurens (8.4 mi) 50585 Sioux Rapids (8.5 mi) 50576 Rembrandt (9 mi) 50515 Ayrshire (12.5 mi) 50527 Curlew (12.8 mi) 51033 Linn Grove (13.3 mi) 50546 Havelock (14.5 mi) 50568 Newell (15.6 mi) 50588 Storm Lake (16.2 mi) 50562 Mallard (19.2 mi)

Demographics updated 05/2026

Population
Total population	381
Population density	9 / sq mi
State FIPS	19
County FIPS	021

Geography
Land area	43.51 sq mi
Water area	0.05 sq mi
Latitude	42.8585
Longitude	-95.0031
Timezone	Central (CT)
Area code	712

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	44.4%	47.2%	40.1%
$50k – $100k	33.3%	31.8%	33.4%
$100k – $200k	14.6%	18.4%	21.5%
Over $200k	7.6%	2.6%	5.0%

Demographics & statistics

381

Population

People per sq mi

42.8

Median age

$56,667

Median household income

$32,407

Per capita income

$59,100

Median home value

$783

Median monthly rent

92.4%

Home ownership

17.0%

Poverty rate

11.0%

Unemployment

201

Housing units

21.5%

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	90	23.6%
18 and over	291	76.4%
65 and over	71	18.6%
Median age	42.8 years

Race & ethnicity

White 87.7%

Two or more races 6.5%

Hispanic or Latino 4.3%

Other race 1.5%

Group	Count	%
White	349	87.7%
Two or more races	26	6.5%
Hispanic or Latino	17	4.3%
Other race	6	1.5%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	44.4%	47.2%	40.1%
$50k – $100k	33.3%	31.8%	33.4%
$100k – $200k	14.6%	18.4%	21.5%
Over $200k	7.6%	2.6%	5.0%

Under $10k 8.9%

$15k–$25k 24.7%

$25k–$35k 5.7%

$35k–$50k 8.2%

$50k–$75k 13.9%

$75k–$100k 7.6%

$100k–$150k 19.0%

$150k–$200k 3.8%

$200k+ 8.2%

Range	% of households
Under $10k	8.9%
$15k–$25k	24.7%
$25k–$35k	5.7%
$35k–$50k	8.2%
$50k–$75k	13.9%
$75k–$100k	7.6%
$100k–$150k	19.0%
$150k–$200k	3.8%
$200k+	8.2%
Median income	$56,667

Housing

Home values

Under $50k 43.2%

$50k–$100k 22.6%

$100k–$150k 17.8%

$150k–$200k 5.5%

$200k–$300k 6.2%

$500k–$1M 1.4%

$1M+ 3.4%

Housing overview

Metric	Value
Median home value	$59,100
Median rent / month	$783
Owner occupied	92.4%
Renter occupied	7.6%
Vacant	25.8%
Single-family detached	98.6%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	6.6
Avg household size (owned)	2.42

Year built

Era	%
2020 or later	0.0%
2010–2019	10.3%
2000–2009	2.8%
1990–1999	0.0%
1980–1989	1.4%
1970–1979	3.8%
1960–1969	9.4%
1950–1959	7.0%
1940–1949	10.8%
1939 or earlier	54.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.2%
2 bedrooms	13.6%
3 bedrooms	55.9%
4 bedrooms	23.0%
5+ bedrooms	2.3%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	17.7%
2 vehicles	36.1%
3 or more	46.2%

Heating fuel

Fuel type	%
Utility gas	53.2%
Electricity	17.7%
Propane / LP gas	26.6%
Fuel oil	2.5%

Households & families

Household type	Count	%
Married-couple family	91	57.6%
Cohabiting couple	6	3.8%
Male householder, no spouse	36	22.8%
Female householder, no spouse	25	15.8%
Households with children under 18	41	25.9%
Households with seniors (65+)	50	31.6%
Average household size	2.41

Marital status

Status	Male	Female
Never married	25.1%	23.7%
Married	56.9%	63.0%
Separated	0.0%	0.0%
Widowed	3.6%	5.2%
Divorced	14.4%	8.1%

Education

Less than 9th grade 1.7%

Some HS, no diploma 3.8%

HS graduate 26.0%

Some college, no degree 39.8%

Associate's degree 7.3%

Bachelor's degree 17.6%

Graduate / professional 3.8%

Metric	%
HS diploma or higher	94.5%
Bachelor's or higher	21.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	6	8.0%
Kindergarten	0	0.0%
Elementary school	16	21.3%
High school	32	42.7%
College / grad school	21	28.0%

Employment

Industry of employment

Agriculture & mining 28.2%

Education & healthcare 25.6%

Manufacturing 11.8%

Transportation & utilities 11.8%

Retail trade 9.7%

Construction 5.1%

Professional & management 3.1%

Wholesale trade 2.6%

Finance & real estate 1.5%

Public administration 0.5%

Occupation

Category	%
Management, business & arts	29.2%
Service	11.8%
Sales & office	13.3%
Natural resources & construction	23.1%
Production & transportation	22.6%

Employment type

Type	%
Private sector	85.1%
Government	9.7%
Self-employed	5.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	83.0%
Carpool	7.2%
Public transit	0.0%
Walk	1.5%
Work from home	6.7%
Other means	1.5%
Avg commute (minutes)	29.3

Poverty

All people 17.0%

Under 18 years 17.4%

18 and over 16.8%

Married-couple families 14.3%

Female-led households 55.6%

Income support

Source	% of households
Social Security	31.0%
Retirement income	20.3%
Supplemental Security	3.2%
Cash public assistance	6.3%
Food stamps / SNAP	12.0%

Health indicators

Condition	%
Obesity	33.1%
High blood pressure	36.3%
High cholesterol	35.2%
Diabetes	11.0%
Heart disease	7.7%
Stroke	3.4%
Asthma	8.9%
Arthritis	27.2%
Kidney disease	3.2%
Pulmonary disease	7.7%
Cancer	8.1%

Behavior / access	%
Smoking	19.0%
Binge drinking	19.6%
No physical activity	25.4%
Less than 7 hrs sleep	29.8%
Depression	16.5%
Fair or poor health	13.8%
Poor mental health	12.5%
Poor physical health	10.5%
No health insurance	8.9%
Visited doctor (checkup)	76.8%
Visited dentist	67.8%
Cholesterol screening	91.1%
Teeth loss	13.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	14	4.8%

Disability	%
Any disability	14.2%
Under 18	2.2%
18–64 years	15.0%
65 and over	26.8%

Health insurance coverage

Type	%
Private insurance	79.8%
Public insurance	37.8%
No insurance	3.4%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	365	95.8%
Spanish	7	1.9%
Other Indo-European	7	1.9%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	366	96.1%
Born in same state	366	96.1%
Born in different state	299	78.5%
Foreign born	0	0.0%
Naturalized citizen	15	3.9%
Not a US citizen	4	26.7%

Ancestry

Ancestry	Count	%
Italian	56	14.7%
Arab	47	12.3%
English	20	5.2%

Ancestry	Count	%
French	19	5%
Dutch	8	2.1%
Polish	6	1.6%

Technology access

Metric	% of households
Computer access	41.5%
Internet access	97.5%

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

Frequently asked questions about ZIP code 50565

What city is ZIP code 50565 in?

ZIP code 50565 is primarily assigned to Marathon, Iowa.

What county is ZIP code 50565 in?

ZIP code 50565 falls within Buena Vista County, Iowa.

Is ZIP code 50565 mostly owner-occupied?

92% of occupied units in ZIP code 50565 are owner-occupied, well above the national average.

What is the poverty rate in ZIP code 50565?

17% of residents in ZIP code 50565 live below the poverty line, above the national average.

What is the typical home value in ZIP code 50565?

The median home value in ZIP code 50565 is $59,100.

What is the population of ZIP code 50565?

ZIP code 50565 has an estimated population of 381 residents, with a density of 9 people per square mile.

What timezone is ZIP code 50565 in?

ZIP code 50565 observes the CST timezone.