City · Iowa
Marquette, Iowa
Marquette, city, in Clayton County, Iowa. Marquette had 436 residents on July 1, 2025 by the Census Bureau's estimate, up 1.9% since 2020; the 2020 Census counted 429 and the ACS 2020-2024 5-year estimates put it at 443 (±109). GEOID 1949620.
Residents, July 2025 estimate
436
Census Bureau estimate (no margin published)
2020 Census count: 429 · ACS 2020-2024: 443 ±109
Median household income
$42,292
±$10,624 (90% margin)
Iowa: $75,059
Median home value
$164,400
±$46,311 (90% margin)
Iowa: $208,000
Median gross rent
$717
±$59 (90% margin)
Iowa: $972
Where is Marquette and what county is it in?
Marquette is a city in Clayton County, Iowa. It covers 1.9 square miles of land, 231 residents per square mile in 2020.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Marquette, and is it growing?
The Census Bureau estimates that 436 people lived in Marquette on July 1, 2025, up 1.9% since 2020, in line with Iowa (+1.5%). The 2020 Census counted 429 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 443 (±109).
| Measure | Marquette | Clayton County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 443 ±109 | 17,013 | no clear change |
| Households | 209 ±48 | 7,509 | no clear change |
| Average household size | 2.12 ±0.29 | 2.23 | no clear change |
| Housing units | 264 ±57 | 8,796 | no clear change |
Marquette's population since 2000
From 421 in 2000 to 436 in 2025: up 3.6%. The 2000, 2010 and 2020 figures are census counts, each for Marquette as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Marquette?
The median resident of Marquette is 41.4 years old; 21.7% are under 18 and 12.6% are 65 or older. The largest group is non-Hispanic white residents at 94.6%, then non-Hispanic residents of two or more races at 2.5%.
| Measure | Marquette | Clayton County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.4 ±9.4 | 46.4 | no clear change |
| Under 18 years | 21.7% ±8.0 pts | 21.6% | – |
| 65 years and over | 12.6% ±5.4 pts | 25.0% | – |
| Male | 46.5% ±6.7 pts | 50.3% | – |
| Hispanic or Latino (any race) | 2.0% ±2.2 pts | 2.3% | – |
| White alone, not Hispanic | 94.6% ±3.6 pts | 95.0% | no clear change |
| Black or African American alone, not Hispanic | 0.5% ±0.8 pts | 0.6% | – |
| Asian alone, not Hispanic | 0.5% ±0.8 pts | 0.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±5.5 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±5.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.5% ±2.4 pts | 1.7% | – |
| Some other race alone, not Hispanic | 0.0% ±5.5 pts | 0.0% | – |
| Born outside the United States | 2.5% ±2.4 pts | 2.3% | – |
| Speak a language other than English at home (age 5+) | 8.8% ±9.2 pts | 5.7% | – |
| Civilian veterans (age 18+) | 10.1% ±5.0 pts | 8.2% | – |
| With a disability | 14.0% ±7.0 pts | 14.7% | – |
| No health insurance coverage | 11.5% ±9.3 pts | 8.4% | – |
| High school graduate or higher (age 25+) | 93.2% ±5.3 pts | 92.6% | – |
| Bachelor's degree or higher (age 25+) | 13.0% ±7.2 pts | 14.5% | no clear change |
| Graduate or professional degree (age 25+) | 1.6% ±1.6 pts | 3.9% | – |
| Lived in the same house a year earlier | 97.5% ±2.9 pts | 90.0% | – |
| Moved from another state in the past year | 0.0% ±5.6 pts | 1.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Marquette earn?
Half of Marquette's 209 households earn less than $42,292 a year (±$10,624), against $67,242 in Clayton County and $75,059 in Iowa. In 2015-2019 it was $51,865 in 2024 dollars; the margins of error cannot tell the two periods apart. 22.6% of residents live below the poverty line.
| Measure | Marquette | Clayton County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $42,292 ±$10,624 | $67,242 | no clear change |
| Mean household income | $60,232 ±$9,129 | $86,441 | – |
| Per capita income | $29,604 ±$4,903 | $38,594 | no clear change |
| People below the poverty line | 22.6% ±12.9 pts | 10.9% | no clear change |
| Children under 18 below the poverty line | 28.1% ±24.7 pts | 12.4% | – |
| Households receiving SNAP | 10.5% ±7.5 pts | 6.7% | – |
| Households with a computer | 97.1% ±2.8 pts | 89.5% | – |
| Households with a broadband subscription | 88.0% ±7.2 pts | 84.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Marquette?
Owners occupy 61.7% of Marquette's occupied homes and renters 38.3%. The median owner-occupied home is valued at $164,400 by its owner (±$46,311). The median renter pays $717 a month including utilities, and 33.8% of renters pay 35% or more of their income on rent.
| Measure | Marquette | Clayton County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $164,400 ±$46,311 | $168,500 | no clear change |
| Median gross rent | $717 ±$59 | $790 | no clear change |
| Renters paying 35% or more of income on rent | 33.8% ±19.8 pts | 36.3% | – |
| Median monthly owner costs, with a mortgage | $1,114 ±$311 | $1,354 | – |
| Owner-occupied homes | 61.7% ±10.3 pts | 78.0% | no clear change |
| Renter-occupied homes | 38.3% ±10.3 pts | 22.0% | – |
| Housing units | 264 ±57 | 8,796 | no clear change |
| Homeowner vacancy rate | 0.0% ±17.5 pts | 0.8% | – |
| Rental vacancy rate | 0.0% ±26.3 pts | 2.9% | – |
| Single-family detached homes | 67.4% ±9.5 pts | 81.2% | – |
| Mobile homes | 0.0% ±9.0 pts | 4.5% | – |
| Built 2020 or later | 0.0% ±9.0 pts | 1.1% | – |
| Built 2010 to 2019 | 5.7% ±5.3 pts | 7.6% | – |
| Built 1939 or earlier | 29.2% ±8.6 pts | 36.6% | – |
| Households with no vehicle | 7.7% ±6.9 pts | 6.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Marquette building?
Builders took permits for 4 new housing units in Marquette in 2025 (4 in single-family houses), 9.2 per 1,000 residents against 4.2 across Iowa.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Marquette work and get to work?
86.8% of Marquette's workers drive alone. The average trip to work takes 13.9 minutes.
| Measure | Marquette | Clayton County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 75.7% ±8.8 pts | 61.7% | – |
| Unemployment rate | 3.6% ±4.6 pts | 2.5% | – |
| Drove alone to work | 86.8% ±10.0 pts | 76.4% | – |
| Carpooled | 9.8% ±9.6 pts | 7.5% | – |
| Public transportation | 0.0% ±9.0 pts | 0.0% | – |
| Walked | 0.0% ±9.0 pts | 4.1% | – |
| Worked from home | 3.4% ±4.2 pts | 8.3% | – |
| Mean travel time to work | 13.9 min ±2.8 | 23.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Marquette?
No census tract lies mostly in Marquette; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 701Clayton County | 2,804 | $57,625 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Marquette) · Census block assignment files
How does Marquette compare with other places in Iowa?
By the Census Bureau's July 2025 estimates, Marquette is the 13,763rd-most populous of the 19,476 U.S. incorporated places that have one and the 465th-most populous of 939 in Iowa.
Marquette is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 465th | 939 |
Marquette's figures with every place in Iowa (CSV)
Every place in Iowa, sortable · Compare Marquette with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Marquette?
25 of the 57 figures for Marquette on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Marquette are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Marquette.