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CITY

Marble Rock

Iowa · 255 residents (2025 est.) · 0.832 sq mi
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The short version

Marble Rock has lower-than-average household income, with a median household income of $65,625. Population has fallen 41% since 2000, a loss of 135 residents. 4% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has more than doubled since 2000, reaching $76,000. With a median age of 51.5, the population is older than the US median of 38.9.

At a glance
Lower income
below the US median
US median: $82,259
Older
median age 51.5
US median: 38.9
Less educated
4% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
191
−41%since 2000
from 326 in 2000
1990 – 2025
Population density
230 / sq mi
−41%since 2000
from 392 / sq mi in 2000
US average: 281
Median age
51.5
+23%since 2000
from 41.8 in 2000
US average: 38.9

PEP 2025 EST:255 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
1732262803333861990201020202024Marble Rock
2024191
1990201020202024
Section 02

Income & economy

Median household income
$65,625
+1%inflation adjusted, since 2000
from $35,500 in 2000
US average: $82,259
1990 – 2024
Per capita income
$34,115
+90%since 2000
from $17,937 in 2000
US average: $44,673
Households earning $100K+
41.4%
+20.6 ptssince 2009
from 20.7% in 2009
US average: 53.3%
Poverty rate
6.3%
−0.9 ptssince 2000
from 7.2% in 2000
US average: 12.5%
Income inequality (Gini)
0.393
−9%since 2010
from 0.434 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade16.2%
US avg: 9.9%
Information9.1%
US avg: 10.8%
Wholesale trade6.1%
US avg: 6.9%
Transportation & warehousing4%
US avg: 2.2%
Finance & insurance3%
US avg: 5.9%
Professional, scientific, technical3%
US avg: 5.1%
Agriculture, forestry, fishing2%
US avg: 1.6%
Construction2%
US avg: 1.2%
Arts, entertainment, food2%
US avg: 1.9%
Other services2%
US avg: 6.7%
Public administration2%
US avg: 4.8%
Manufacturing0%
US avg: 0.4%
Education & health services0%
US avg: 0.9%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$76,000
+20%inflation adjusted, since 2000
from $34,800 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$822
+27%inflation adjusted, since 2000
from $356 in 2000
US average: $1,442
Owner-occupied
75.9%
+1.4 ptssince 2000
from 74.5% in 2000
24.1% rent
Vacancy rate
18.7%
+16.5 ptssince 2009
from 2.2% in 2009
US average: 10.0%
Owner cost-burdened
24.2%
+6.5 ptssince 2009
from 17.7% in 2009
US average: 22.9%
Renter cost-burdened
14.3%
−3.9 ptssince 2009
from 18.2% in 2009
US average: 47.4%
Afford Score
1.2
+18%since 2000
from 1.0 in 2000
1990 – 2024
Gentrification Score
46
RELATED:See current rent listings in Marble Rock on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic99.4%(324)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other0%
Diversity Score0%(0)
2024
White, non-Hispanic93.7%(179)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other6.3%(12)
Diversity Score14.7%(28)
Diversity Score
15
from 0 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
3.8%
−2.3 ptssince 2000
from 6.1% in 2000
US average: 35.6%
High school or higher
95.5%
+15.1 ptssince 2000
from 80.4% in 2000
US average: 89.6%
Graduate degree
1.5%
−1.8 ptssince 2000
from 3.3% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
25.4 min
+4%since 2000
from 24.4 min in 2000
US average: 26.5
Drive alone to work
85.9%
−0.5 ptssince 2009
from 86.3% in 2009
US average: 68.9%
Carpooled to work
9.1%
+2.6 ptssince 2009
from 6.5% in 2009
US average: 8.5%
Public transit
0.0%
−1.4 ptssince 2009
from 1.4% in 2009
US average: 3.2%
Worked from home
4.0%
+1.2 ptssince 2009
from 2.9% in 2009
US average: 15.0%
Walked to work
1.0%
−1.9 ptssince 2009
from 2.9% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
2.3%
−2.9 ptssince 2009
from 5.2% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
5.7%
+1.4 ptssince 2011
from 4.3% in 2011
US average: 5.2%
Labor force participation
63.3%
−3.8 ptssince 2011
from 67.1% in 2011
US average: 63.5%
Self-employed
22.2%
+7.2 ptssince 2009
from 15.1% in 2009
US average: 13.1%
Management & professional
20.2%
−55.8 ptssince 2009
from 76.0% in 2009
US average: 42.5%
Section 08

People & community

Male
50.8%
+5.0 ptssince 2009
from 45.8% in 2009
Female
49.2%
−5.0 ptssince 2009
from 54.2% in 2009
Foreign born
0.0%
−1.1 ptssince 2009
from 1.1% in 2009
US average: 14.1%
Veterans
7.4%
−36.4 ptssince 2009
from 43.8% in 2009
US average: 6.2%
With a disability
16.8%
+1.4 ptssince 2012
from 15.4% in 2012
US average: 13.3%
Uninsured
5.8%
−89.3 ptssince 2013
from 95.1% in 2013
US average: 8.4%
Broadband at home
92.0%
+34.3 ptssince 2017
from 57.7% in 2017
US average: 91.0%
English only at home
100.0%
+3.6 ptssince 2016
from 96.4% in 2016
US average: 77.7%
Spanish at home
0.0%
−3.3 ptssince 2016
from 3.3% in 2016
US average: 13.6%
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Frequently asked

How many people live in Marble Rock, Iowa?

Marble Rock, Iowa has about 191 residents according to the 2024 American Community Survey.

What is the median household income in Marble Rock, Iowa?

The typical household in Marble Rock, Iowa earns about $65,625 a year. Half of households make more than that, and half make less.

Is Marble Rock, Iowa expensive?

In Marble Rock, Iowa, the median home is worth about $76,000, and the typical rent is about $822 a month.

How educated are people in Marble Rock, Iowa?

About 3.8% of adults age 25 and over in Marble Rock, Iowa hold a bachelor's degree or higher.

What is the poverty rate in Marble Rock, Iowa?

About 6.3% of people in Marble Rock, Iowa live below the federal poverty line.

Has Marble Rock, Iowa grown since 1990?

Yes, Marble Rock, Iowa has shrunk since 1990. The population has lost about 177 residents, a change of about -48 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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