City · Minnesota
Onamia, Minnesota
Onamia, city, in Mille Lacs County, Minnesota. Onamia had 839 residents on July 1, 2025 by the Census Bureau's estimate, up 7.2% since 2020; the 2020 Census counted 784 and the ACS 2020-2024 5-year estimates put it at 719 (±108). GEOID 2748310.
Residents, July 2025 estimate
839
Census Bureau estimate (no margin published)
2020 Census count: 784 · ACS 2020-2024: 719 ±108
Median household income
$32,750
±$8,644 (90% margin)
Minnesota: $89,062
Median home value
$122,900
±$13,781 (90% margin)
Minnesota: $329,300
Median gross rent
$656
±$199 (90% margin)
Minnesota: $1,280
Where is Onamia and what county is it in?
Onamia is a city in Mille Lacs County, Minnesota. It covers 1.0 square miles of land, 798 residents per square mile in 2020.
Onamia is in the Minneapolis-St. Paul-Bloomington, MN-WI metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Onamia, and is it growing?
The Census Bureau estimates that 839 people lived in Onamia on July 1, 2025, up 7.2% since 2020, faster than Minnesota (+2.2%). The 2020 Census counted 784 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 719 (±108).
| Measure | Onamia | Mille Lacs County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 719 ±108 | 27,125 | −227 |
| Households | 329 ±49 | 10,672 | no clear change |
| Average household size | 1.84 ±0.19 | 2.50 | −0.38 |
| Housing units | 382 ±53 | 13,069 | no clear change |
Onamia's population since 2000
From 847 in 2000 to 839 in 2025: down 0.9%. The 2000, 2010 and 2020 figures are census counts, each for Onamia 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 Onamia?
The median resident of Onamia is 45.9 years old; 24.8% are under 18 and 30.0% are 65 or older. The largest group is non-Hispanic white residents at 82.1%, then non-Hispanic American Indian and Alaska Native residents at 7.2%.
| Measure | Onamia | Mille Lacs County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 45.9 ±6.9 | 41.2 | no clear change |
| Under 18 years | 24.8% ±4.8 pts | 23.1% | – |
| 65 years and over | 30.0% ±4.6 pts | 18.6% | – |
| Male | 45.6% ±4.0 pts | 50.9% | – |
| Hispanic or Latino (any race) | 1.0% ±1.0 pts | 2.3% | – |
| White alone, not Hispanic | 82.1% ±6.0 pts | 88.0% | +11.4 pts |
| Black or African American alone, not Hispanic | 1.5% ±1.7 pts | 0.4% | – |
| Asian alone, not Hispanic | 0.7% ±1.0 pts | 0.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 7.2% ±4.1 pts | 4.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±3.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 7.0% ±5.6 pts | 3.6% | – |
| Some other race alone, not Hispanic | 0.6% ±0.7 pts | 0.5% | – |
| Born outside the United States | 1.1% ±1.3 pts | 1.4% | – |
| Speak a language other than English at home (age 5+) | 3.9% ±2.9 pts | 3.5% | – |
| Civilian veterans (age 18+) | 7.2% ±3.0 pts | 7.9% | – |
| With a disability | 29.5% ±5.7 pts | 15.7% | – |
| No health insurance coverage | 7.9% ±3.0 pts | 4.9% | no clear change |
| High school graduate or higher (age 25+) | 90.2% ±5.3 pts | 91.6% | – |
| Bachelor's degree or higher (age 25+) | 18.9% ±4.9 pts | 18.2% | no clear change |
| Graduate or professional degree (age 25+) | 7.4% ±3.3 pts | 5.4% | – |
| Lived in the same house a year earlier | 75.1% ±8.4 pts | 88.4% | – |
| Moved from another state in the past year | 2.4% ±2.7 pts | 0.7% | – |
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 Onamia earn?
Half of Onamia's 329 households earn less than $32,750 a year (±$8,644), against $72,729 in Mille Lacs County and $89,062 in Minnesota. In 2015-2019 it was $40,950 in 2024 dollars; the margins of error cannot tell the two periods apart. 26.2% of residents live below the poverty line.
| Measure | Onamia | Mille Lacs County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $32,750 ±$8,644 | $72,729 | no clear change |
| Mean household income | $50,069 ±$9,396 | $90,096 | – |
| Per capita income | $25,184 ±$3,664 | $36,173 | no clear change |
| People below the poverty line | 26.2% ±7.1 pts | 10.4% | no clear change |
| Children under 18 below the poverty line | 32.6% ±17.4 pts | 12.7% | no clear change |
| Households receiving SNAP | 31.9% ±7.3 pts | 11.0% | – |
| Households with a computer | 80.2% ±5.9 pts | 93.4% | – |
| Households with a broadband subscription | 76.0% ±5.8 pts | 87.4% | – |
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 Onamia?
Owners occupy 51.1% of Onamia's occupied homes and renters 48.9%. The median owner-occupied home is valued at $122,900 by its owner (±$13,781). The median renter pays $656 a month including utilities, and 44.3% of renters pay 35% or more of their income on rent.
| Measure | Onamia | Mille Lacs County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $122,900 ±$13,781 | $258,300 | no clear change |
| Median gross rent | $656 ±$199 | $903 | no clear change |
| Renters paying 35% or more of income on rent | 44.3% ±11.1 pts | 34.0% | no clear change |
| Median monthly owner costs, with a mortgage | $1,046 ±$101 | $1,733 | – |
| Owner-occupied homes | 51.1% ±6.9 pts | 77.9% | no clear change |
| Renter-occupied homes | 48.9% ±6.9 pts | 22.1% | – |
| Housing units | 382 ±53 | 13,069 | no clear change |
| Homeowner vacancy rate | 0.6% ±1.4 pts | 1.2% | – |
| Rental vacancy rate | 1.2% ±1.8 pts | 5.9% | – |
| Single-family detached homes | 57.1% ±6.2 pts | 73.6% | – |
| Mobile homes | 5.8% ±3.3 pts | 9.9% | – |
| Built 2020 or later | 0.0% ±5.7 pts | 1.9% | – |
| Built 2010 to 2019 | 3.7% ±2.1 pts | 5.7% | – |
| Built 1939 or earlier | 19.4% ±6.2 pts | 15.2% | – |
| Households with no vehicle | 25.5% ±7.6 pts | 5.5% | – |
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 Onamia building?
Builders took permits for 1 new housing units in Onamia in 2025 (1 in single-family houses), 1.2 per 1,000 residents against 3.6 across Minnesota.
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 Onamia work and get to work?
66.2% of Onamia's workers drive alone and 10.8% work from home. The average trip to work takes 22.3 minutes.
| Measure | Onamia | Mille Lacs County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 42.0% ±5.0 pts | 64.3% | – |
| Unemployment rate | 6.3% ±4.2 pts | 4.0% | – |
| Drove alone to work | 66.2% ±8.6 pts | 76.4% | – |
| Carpooled | 1.8% ±1.8 pts | 9.9% | – |
| Public transportation | 0.0% ±9.6 pts | 0.4% | – |
| Walked | 18.5% ±8.4 pts | 2.1% | – |
| Worked from home | 10.8% ±5.6 pts | 10.2% | +6.5 pts |
| Mean travel time to work | 22.3 min ±4.6 | 32.0 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 Onamia?
No census tract lies mostly in Onamia; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9702Mille Lacs County | 2,700 | $55,625 |
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 Onamia) · Census block assignment files
How does Onamia compare with other places in Minnesota?
By the Census Bureau's July 2025 estimates, Onamia is the 11,017th-most populous of the 19,476 U.S. incorporated places that have one and the 388th-most populous of 855 in Minnesota.
Onamia 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 | 388th | 855 |
Onamia's figures with every place in Minnesota (CSV)
Every place in Minnesota, sortable · Compare Onamia 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 Onamia?
15 of the 57 figures for Onamia 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 Onamia 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 Onamia.