Marble Rock is a city located in Floyd County Iowa. Marble Rock has a 2024 population of 260. Marble Rock is currently declining at a rate of -0.76% annually and its population has decreased by -2.99% since the most recent census, which recorded a population of 268 in 2020.
The average household income in Marble Rock is $74,936 with a poverty rate of 7.04%. The median age in Marble Rock is 55.1 years: 52.5 years for males, and 55.8 years for females.
According to the most recent ACS, the racial composition of Marble Rock was:
Race | Population | Percentage (of total) |
|---|---|---|
| White | 190 | 95.48% |
| Two or more races | 9 | 4.52% |
| Black or African American | 0 | 0% |
| Native American | 0 | 0% |
| Asian | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
| Other race | 0 | 0% |
White
Two or more races
Black or African American
Native American
Asian
Native Hawaiian or Pacific Islander
Other race
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 99 | 2.01 | 74.7 | 25.3 |
| Non Family | 50 | 1.18 | 58 | 42 |
| Married | 32 | 2.72 | 100 | 0 |
| Female | 11 | 2.91 | 81.8 | 18.2 |
| Male | 6 | 3.5 | 66.7 | 33.3 |
2.73
Average Family Size
2.01
Average Household Size
74.7%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Education Attained | Count | Percentage |
|---|---|---|
| 9th to 12th Grade | 9 | 5.88% |
| Associates Degree | 15 | 9.8% |
| Bachelors Degree | 4 | 2.61% |
| Graduate Degree | 1 | 0.65% |
| High School Graduate | 77 | 50.33% |
| Less Than 9th Grade | 2 | 1.31% |
| Some College | 45 | 29.41% |
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 146 | 137 | 5 |
| 2+ Races | 7 | 5 | 0 |
The highest rate of high school graduation is among white people with a rate of 93.84%.
The highest rate of bachelors degrees is among white people with a rate of 3.42%.
All
Male
Female
Name | Average | Male | Female |
|---|---|---|---|
| Bachelors Degree | $24,167 | $0 | $24,167 |
| Graduate Degree | $0 | $0 | $0 |
| High School Graduate | $40,000 | $59,375 | $29,750 |
| Less Than 9th Grade | $30,000 | $0 | $0 |
| Overall | $36,635 | $44,821 | $31,667 |
| Some College | $37,000 | $45,000 | $35,833 |
$36,635
Average Earnings
$44,821
Average Male
$31,667
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
100% of Marble Rock residents speak only English, while 0% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0% of the population.
rate
Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 190 | 13 | 6.84% |
| Multiple | 9 | 1 | 11.11% |
7.04%
Overall Poverty Rate
5%
Male Poverty Rate
9.09%
Female Poverty Rate
The race most likely to be in poverty in Marble Rock is Multiple, with 11.11% below the poverty level.
The race least likely to be in poverty in Marble Rock is White, with 6.84% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 2.74%. Among those working part-time, it was 9.8%, and for those that did not work, the poverty rate was 3.85%.
rate
Rate | Poverty |
|---|---|
| Less Than 9th Grade | 9.09% |
| Some College | 6.67% |
| High School | 5.19% |
| Bachelors or Greater | 0% |
rate
Rate | Poverty |
|---|---|
| Female Employed | 8.62% |
| Male Employed | 3.85% |
| Male Unemployed | 0% |
| Female Unemployed | 0% |
Households
Families
MarriedFamilies
NonFamilies
Name | Median | Mean |
|---|---|---|
| Families | $76,875 | $102,906 |
| Households | $65,938 | $74,936 |
| Married Families | $110,000 | $-999,999,999 |
| Non Families | $33,929 | $42,980 |
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
38.1%
Overall Marriage Rate
40.5%
Male Marriage Rate
35.9%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
22
Number of Veterans
19
Male Veterans
3
Female Veterans
War | Veterans |
|---|---|
| Vietnam | 13 |
| First Gulf War | 3 |
| Second Gulf War | 0 |
| Korea | 0 |
| World War II | 0 |
count
Age Group | Veterans |
|---|---|
| 65 to 74 | 14 |
| 75+ | 5 |
| 55 to 64 | 2 |
| 35 to 54 | 1 |
| 18 to 34 | 0 |
count
Name | Veterans | % of Total |
|---|---|---|
| White | 22 | 13.33% |
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
0%
Veteran Poverty Rate
40.91%
Veteran Disability Rate
LaborForceParticipation
65.9%
Labor Force Participation
62.5%
Employment Rate
5.2%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
87.94%
Born in Marble Rock
100%
Native Born
0%
Foreign Born
0%
Non Citizen
0%
Naturalized
100% of Marble Rock residents were born in the United States, with 87.94% having been born in Iowa. 0% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.
Year | Population | Growth | Change |
|---|---|---|---|
| 2029 | 250 | -2 | -0.79% |
| 2028 | 252 | -2 | -0.79% |
| 2027 | 254 | -2 | -0.78% |
| 2026 | 256 | -2 | -0.78% |
| 2025 | 258 | -2 | -0.77% |
| 2024 | 260 | -2 | -0.76% |
| 2023 | 262 | 0 | 0% |
| 2022 | 262 | -3 | -1.13% |
| 2021 | 265 | -3 | -1.12% |
| 2020 | 268 | -22 | -7.59% |
| 2019 | 290 | -2 | -0.68% |
| 2018 | 292 | -3 | -1.02% |
| 2017 | 295 | -1 | -0.34% |
| 2016 | 296 | -4 | -1.33% |
| 2015 | 300 | -2 | -0.66% |
| 2014 | 302 | -1 | -0.33% |
| 2013 | 303 | -3 | -0.98% |
| 2012 | 306 | 0 | 0% |
| 2011 | 306 | -4 | -1.29% |
| 2010 | 310 | 0 | 0% |