Marquette, IA

City in Clayton County, IA, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

443

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

41.4

years ∙ half population younger than 41.4, half older

Diversity Index

10.4%

chance two random people differ in race and ethnicity

Nativity

2.5%

foreign-born population

97.5%Native

2.5% Foreign-born

Geographic Context

Location, size, and surroundings

About

Marquette is a city within Clayton County, Iowa, United States.

Location

City in Clayton County, IA, US

Co-ordinates

DEC43.043143° N, 91.192527° W

DMS43° 02′ 35.31″ N, 91° 11′ 33.10″ W

Population Density & area

238.2/sq mi (92.1/km²)

Total Area

1.93 sq mi (4.98 km²)

Land Area

1.86 sq mi (4.81 km²) · 96.6%

Water Area

0.07 sq mi (0.17 km²) · 3.4%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

46.5% male

Male 46.5%

Female 53.5%

males per 100 females

Marquette 86.9

Clayton County 101.3

Iowa 100.6

Nativity

2.5%

foreign-born population

97.5%Native

2.5% Foreign-born

% Foreign-born

Marquette 2.5%

Clayton County 2.3%

Iowa 5.9%

Age Distribution

How the population is spread across age groups

Median Age

41.4

years ∙ half population younger than 41.4, half older

Marquette

41.4

Clayton County

46.4

Iowa

38.6

Dependency ratio

52.2

dependents per 100 working-age adults

Marquette 52.2

Clayton County 87.5

Iowa 69.6

AGE DISTRIBUTION

Distribution of age group

Median age

	Marquette	Clayton County	Iowa
Age Group
Children (Under 18)	21.7%	21.6%	22.9%
Working age (18-64)	65.7%	53.4%	59%
Senior (65+)	12.6%	25%	18.1%
Dependency ratio
Total dependency ratio	52.2	87.5	69.6
Child dependency ratio	33	40.6	38.8
Old-age dependency ratio	19.2	47	30.7

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

94.6%

Black

0.5%

Asian

0.5%

Hispanic

Other

2.4%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

10.4%

chance two random people differ in race and ethnicity

Marquette 10.4%

Clayton County 9.7%

Iowa 31.4%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Marquette population

	Marquette	Clayton County	Iowa
Hispanic or Latino	2%	2.3%	7.3%
Mexican	0%	1.2%	5%
Puerto Rican	0%	0.1%	0.3%
Cuban	0%	0%	0.1%
Other Hispanic / Latino	2%	1%	1.8%
Not Hispanic or Latino	98%	97.7%	92.7%
One race	95.5%	96%	89.2%
White	94.6%	95%	82.3%
Black or African American	0.5%	0.6%	3.8%
American Indian and Alaska Native	0%	0%	0.2%
Asian	0.5%	0.3%	2.5%
Native Hawaiian and Other Pacific Islander	0%	0%	0.2%
Some Other Race	0%	0%	0.3%
Two or more races (Multiracial)	2.5%	1.7%	3.5%

Household & Families Composition

Household size, type, and family structure

Household structure

53.6% family

Family 53.6%

Non family 46.4%

% family households

Marquette 53.6%

Clayton County 61.9%

Iowa 61.6%

Average household size

2.12

persons per household

Marquette

2.12

Clayton County

2.23

Iowa

2.36

Household & Family COMPOSITION

Households

Percentage of Marquette population

	Marquette	Clayton County	Iowa
Total households	209	7,509	1,315,707
Average houshold size	2.12	2.23	2.36
Family households	112	4,649	809,836
Average family size	2.95	2.83	2.98
Married couple family	87	3,831	635,347
Other families	25	818	174,489
Male householder	11	342	56,457
Female householder	14	476	118,032
Non-family households	97	2,860	505,871
One-person households	88	2,547	406,436
Male householder	44	1,265	193,582
Senior (65+) living alone	6	436	58,028
Female householder	44	1,282	212,854
Senior (65+) living alone	11	725	111,645
Other living arrangements	9	313	99,435

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

264

housing units

Marquette 264

Clayton County 8,796

Iowa 1,437,699

Occupancy status

79.2% occupied

Occupied 79.2%

Vacant 20.8%

vacancy rate

Marquette 20.8%

Clayton County 14.6%

Iowa 8.5%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

68.2%

Single family houses

68.2%

Apartments in multi-unit structures

31.9%

Mobile homes

Boat, RV, van, etc

Median Year Built

1980

Half of houses were built before 1980, and half after.

Historic ∙ 1939 or earlier

29.2%

Postwar & mid-century ∙ 1940 - 1969

Late 20th century ∙ 1970 - 1999

41.3%

Modern ∙ 2000 or later

20.5%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Marquette	Clayton County	Iowa
Rooms per unit
Median rooms	5.5	6.1	5.9
1–3 rooms	16.3%	11.2%	11.8%
4–6 rooms	50.7%	46.6%	47.4%
7+ rooms	33%	42.1%	40.7%
Bedrooms
No bedroom / studio	0%	2%	1.7%
1 bedroom	21.2%	9.6%	9.2%
2 bedrooms	30.3%	25.6%	27%
3 bedrooms	42.8%	37.8%	37.3%
4+ bedrooms	5.7%	25%	24.7%
At a glance
Median year built	1980	1960	1972
Total housing units	264	8,796	1,437,699

Occupancy Profile

Who is inside and how they use it

Homeownership

61.7% owners

Renter-occupied 38.3%

Owner-occupied 61.7%

homeownership rate

Marquette 61.7%

Clayton County 78%

Iowa 71.7%

Average household size

2.22

Owner-occupied

1.96

Renter-occupied

owner-occupied average size

Marquette 2.22

Clayton County 2.28

Iowa 2.5

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Marquette	Clayton County	Iowa
Total occupied units	209	7,509	1,315,707
Year moved in
2020 or later	12.5%	16.6%	24.3%
2010 to 2019	37.3%	35.1%	38.7%
2000 to 2009	22.5%	19.6%	16.4%
1999 or earlier	27.8%	28.7%	20.7%
Occupants per room
1.00 or fewer	98.1%	99%	98.4%
1.01 to 1.50	1.9%	0.5%	1.1%
1.51 or more	0%	0.5%	0.5%
Vehicles availability
No vehicles	7.7%	6.9%	5.4%
1 vehicle	35.4%	28.1%	30.5%
2 vehicles	48.8%	37.9%	37.8%
3 or more vehicles	8.1%	27.1%	26.3%
House heating fuel used
Gas	59.4%	76.8%	72.8%
Electricity	38.3%	15.6%	24.4%
Solar	0%	0%	0.1%
Fuel oil, kerosene etc	0%	1.5%	0.3%
All other fuels	2.4%	6%	1.8%
No fuel used	0%	0.1%	0.6%
Selected characteristics
Lacking complete plumbing	0%	1.4%	0.3%
Lacking complete kitchen	0%	2.1%	0.8%
No telephone service available	0%	1.6%	0.8%

Housing Value

What owner-occupied units are worth

Median home value

$164,400

owner-occupied units

Median value(USD)

Marquette

$164,400

Clayton County

$168,500

Iowa

$208,000

Housing Cost Burden

36.8%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

36.8%

Owners without a mortgage

26.3%

Renters

42.9%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Marquette	Clayton County	Iowa
Property value
Median Value	$164,400	$168,500	$208,000
Under $100,000	33.3%	22.9%	17.8%
$100,000 - $200,000	24.9%	36.1%	30%
$200,000 - $300,000	24.8%	18.5%	23.1%
$300,000 - $500,000	14%	14.1%	21.3%
$500,000 - $1,000,000	1.6%	6.5%	6.8%
$1,000,000 and more	1.6%	1.9%	1.1%
Owner-occupied households
With a mortgage	52.7%	47.5%	59.4%
Without a mortgage	47.3%	52.5%	40.6%
Median monthly owner costs
With a mortgage	$1,114	$1,354	$1,533
Without a mortgage	$686	$583	$616
Gross rent
Median rent	$717	$790	$972

Education Profile

How educated is the community and how education pays off

Adults with a college degree

13%

of adults 25+ with a bachelor's degree or higher

Marquette 13%

Clayton County 14.5%

Iowa 31.4%

Adults without a high school diploma

6.8%

of adults (25+) without a high school diploma

Marquette 6.8%

Clayton County 7.5%

Iowa 6.7%

School Enrollment

Who is enrolled in school and at what level

School enrollment

population (age 3+) enrolled in school

Nursery / Preschool

K–12

93.4%

College / Undergraduate

Graduate / Professional

6.6%

College-going rate (18-24 yr olds)

10.3%

of 18-24-year-olds in college or graduate school

Marquette

10.3%

Clayton County

13.2%

Iowa

42.3%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Marquette	Clayton County	Iowa
Total enrolled (age 3+)	61	3,103	784,322
Nursery / preschool	0%	6.5%	6.2%
K–12	93.4%	80.6%	68.4%
Kindergarten	0%	6.4%	5.2%
Elementary: Grades 1–4	19.7%	24.3%	20.3%
Elementary: Grades 5–8	23%	24.9%	21.3%
High School: Grades 9–12	50.8%	24.9%	21.6%
College or graduate school	6.6%	12.9%	25.4%
College, undergraduate	0%	10.4%	20.8%
Graduate, professional school	6.6%	2.5%	4.6%
College-going rate · 18-24 yr olds	10.3%	13.2%	42.3%
School type
Public school	68.9%	86.9%	84.4%
Private school	31.1%	13.1%	15.6%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

308

population 25 years and over

Total adults (25+)

Less than 9th grade

1.9%

9th-12th, no diploma

4.9%

HS graduate

42.5%

Some college no degree

31.5%

Associates degree

6.2%

Bachelors degree

11.4%

Graduate or professional degree

1.6%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

100% · 0%

9th-12th, no diploma

60% · 40%

HS graduate

55.7% · 44.3%

Some college no degree

41.2% · 58.8%

Associates degree

42.1% · 57.9%

Bachelors degree

22.9% · 77.1%

Graduate or professional degree

0% · 100%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Marquette	Clayton County	Iowa
Population (25+)	308	12,184	2,154,149
Less than 9th grade	1.9%	3.3%	2.7%
9th–12th, no diploma	4.9%	4.2%	4%
High school diploma or GED	42.5%	44.1%	30%
Some college, no degree	31.5%	21.9%	19.7%
Associate's degree	6.2%	12.1%	12.1%
Bachelor's degree or higher	13%	14.5%	31.4%
Bachelor's degree	11.4%	10.6%	20.9%
Graduate or professional	1.6%	3.9%	10.5%
High School or higher	93.2%	92.6%	93.3%

Earnings by education level

percentage as applicable

Median Earnings

$43,043

Median earnings for adults 25+, by level

Less than HS graduate

$21,875

HS graduate

$41,875

Some college or associates

$47,778

Bachelors degree

$48,750

Graduate or professional degree

$—

Poverty Rate

for ages 25+, with bachelors degree or higher

Less than HS graduate

42.9%

HS graduate

32.8%

Some college or associates

7.8%

Bachelors degree or higher

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Marquette	Clayton County	Iowa
Median earnings
Population 25+, with earnings	$43,043	$48,625	$51,106
Less than high school graduate	$21,875	$42,885	$35,996
High school graduate (includes equivalency)	$41,875	$45,610	$41,528
Some college or associate's degree	$47,778	$48,792	$47,635
Bachelor's degree	$48,750	$60,586	$62,744
Graduate or professional degree	$—	$54,592	$80,022
Poverty rates
Less than high school graduate	42.9%	19.1%	21.5%
High school graduate (includes equivalency)	32.8%	12.4%	12.4%
Some college or associate's degree	7.8%	7.6%	8.1%
Bachelor's degree or higher	0%	3.6%	3.8%

Insights for Marquette, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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