Marble Rock ZIP Codes — Floyd County, IA

There is one unique ZIP code in Marble Rock, Iowa and it is 50653. Area code: 641.

ZIP codes

51.71

sq mi land

0.30

sq mi water

641

area code

Marble Rock, IA ZIP code map

About Marble Rock, IA

Marble Rock is a quaint city located in Floyd County, Iowa. Known for its charming small-town atmosphere, the community offers a peaceful lifestyle with a rural backdrop. The city exemplifies Midwestern values and is an inviting place for residents and visitors alike.

Location & geography

Marble Rock is situated in the north-central part of Iowa, approximately 18 miles southwest of Mason City and about 12 miles southeast of Charles City. The total area of Marble Rock encompasses 51.71 square miles of land, with an additional 0.30 square miles of water. The city's terrain is primarily flat and showcases the beauty of the Iowa landscape.

Community & economy

The character of Marble Rock is defined by its friendly residents and close-knit community. Agriculture is an important industry in the area, with local farms contributing to the economy and landscape. Daily life here revolves around community events and local gatherings that highlight the city’s spirit and camaraderie.

Transportation

Marble Rock is accessible via U.S. Route 14, making it easy for residents to connect with nearby towns and cities. The nearest regional airport is the Mason City Municipal Airport, located about 18 miles away, which offers services for travelers. Public transportation options are limited, as the area is primarily served by private vehicles.

History

Marble Rock was founded in the late 19th century, with key industries centered around agriculture and marble quarrying, which is reflected in the city's name. Over the years, the city has hosted various community events that celebrate its history and agricultural heritage. Notable events have included local fairs and festivals that bring together residents and visitors.

Did you know?

A little-known fact about Marble Rock is that its name was derived from the unique white marble that was once quarried in the area. This marble was used in several notable constructions and is a testament to the city's historic industries.

ZIP codes for Marble Rock, IA (1)

ZIP code	City	County	Map
50653	Marble Rock	Floyd	View map

Demographics & statistics

504

Population

44.5

Median age

$69,643

Median household income

$33,281

Per capita income

$129,200

Median home value

$618

Median monthly rent

81.8%

Home ownership

4.2%

Poverty rate

3.2%

Unemployment

185

Housing units

13.2%

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	119	23.6%
18 and over	385	76.4%
65 and over	122	24.2%
Median age	44.5 years

Race & ethnicity

White 96.3%

Two or more races 2.1%

Hispanic or Latino 1.6%

Group	Count	%
White	493	96.3%
Two or more races	11	2.1%
Hispanic or Latino	8	1.6%

Household income

Under $10k 4.5%

$10k–$15k 2.0%

$15k–$25k 3.0%

$25k–$35k 5.1%

$35k–$50k 19.7%

$50k–$75k 20.7%

$75k–$100k 5.6%

$100k–$150k 29.8%

$150k–$200k 4.5%

$200k+ 5.1%

Range	% of households
Under $10k	4.5%
$10k–$15k	2.0%
$15k–$25k	3.0%
$25k–$35k	5.1%
$35k–$50k	19.7%
$50k–$75k	20.7%
$75k–$100k	5.6%
$100k–$150k	29.8%
$150k–$200k	4.5%
$200k+	5.1%
Median income	$69,643

Housing

Home values

Under $50k 22.8%

$50k–$100k 15.4%

$100k–$150k 14.8%

$150k–$200k 27.2%

$200k–$300k 19.8%

Housing overview

Metric	Value
Median home value	$129,200
Median rent / month	$618
Owner occupied	81.8%
Renter occupied	18.2%
Vacant	10.4%
Single-family detached	94.1%
Large apartment buildings	0.9%
Mobile homes	0.9%
Median rooms	6.1
Avg household size (owned)	2.52

Year built

Era	%
2020 or later	0.0%
2010–2019	5.9%
2000–2009	8.6%
1990–1999	0.5%
1980–1989	5.9%
1970–1979	27.1%
1960–1969	7.2%
1950–1959	6.8%
1940–1949	5.4%
1939 or earlier	32.6%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	4.1%
2 bedrooms	29.0%
3 bedrooms	43.4%
4 bedrooms	17.2%
5+ bedrooms	5.0%

Vehicles per household

Vehicles	% of households
No vehicle	3.0%
1 vehicle	25.3%
2 vehicles	22.7%
3 or more	49.0%

Heating fuel

Fuel type	%
Utility gas	50.5%
Electricity	14.1%
Propane / LP gas	32.3%
Wood	2.0%

Households & families

Household type	Count	%
Married-couple family	115	58.1%
Cohabiting couple	17	8.6%
Male householder, no spouse	39	19.7%
Female householder, no spouse	27	13.6%
Households with children under 18	61	30.8%
Households with seniors (65+)	82	41.4%
Average household size	2.55

Marital status

Status	Male	Female
Never married	39.8%	16.5%
Married	41.6%	65.2%
Separated	0.0%	0.6%
Widowed	6.9%	6.1%
Divorced	11.7%	11.6%

Education

Less than 9th grade 3.3%

Some HS, no diploma 6.0%

HS graduate 40.7%

Some college, no degree 20.7%

Associate's degree 16.2%

Bachelor's degree 12.6%

Graduate / professional 0.6%

Metric	%
HS diploma or higher	90.7%
Bachelor's or higher	13.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	19	15.6%
Kindergarten	4	3.3%
Elementary school	32	26.2%
High school	54	44.3%
College / grad school	13	10.7%

Employment

Industry of employment

Manufacturing 22.9%

Education & healthcare 20.8%

Agriculture & mining 13.8%

Public administration 11.7%

Retail trade 6.3%

Construction 5.8%

Finance & real estate 5.4%

Arts, food & hospitality 5.0%

Transportation & utilities 2.9%

Wholesale trade 2.1%

Information 1.3%

Professional & management 1.3%

Other services 0.8%

Occupation

Category	%
Management, business & arts	27.5%
Service	12.1%
Sales & office	15.4%
Natural resources & construction	18.8%
Production & transportation	26.3%

Employment type

Type	%
Private sector	71.7%
Government	17.1%
Self-employed	10.8%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	81.3%
Carpool	13.8%
Public transit	0.0%
Walk	1.3%
Other means	0.0%
Avg commute (minutes)	31.4

Poverty

All people 4.2%

Under 18 years 5.0%

18 and over 3.9%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	39.4%
Retirement income	34.3%
Supplemental Security	7.6%
Cash public assistance	1.5%
Food stamps / SNAP	6.1%

Health indicators

Condition	%
High blood pressure	35.8%
High cholesterol	34.5%
Heart disease	7.5%
Stroke	3.3%
Asthma	9.0%
Arthritis	27.3%
Kidney disease	3.1%
Pulmonary disease	7.3%
Cancer	8.1%

Behavior / access	%
Binge drinking	20.0%
No physical activity	23.5%
Less than 7 hrs sleep	30.0%
Fair or poor health	12.9%
Poor mental health	12.6%
Poor physical health	9.8%
No health insurance	8.5%
Visited doctor (checkup)	76.4%
Visited dentist	68.7%
Cholesterol screening	89.8%
Teeth loss	12.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	30	7.8%

Disability	%
Any disability	13.7%
Under 18	10.9%
18–64 years	10.6%
65 and over	23.0%

Health insurance coverage

Type	%
Private insurance	82.7%
Public insurance	39.9%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	478	94.8%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	503	99.8%
Born in same state	503	99.8%
Born in different state	468	92.9%
Foreign born	0	0.0%
Naturalized citizen	1	0.2%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	35	6.9%
Italian	30	6%
Polish	14	2.8%

Ancestry	Count	%
Arab	10	2%
English	8	1.6%

Technology access

Metric	% of households
Computer access	39.3%
Internet access	93.9%

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

Frequently asked questions

What ZIP codes does Marble Rock, IA have?

Marble Rock, IA has one ZIP code: 50653. Each ZIP code serves a distinct delivery area within the city and surrounding region.