City · Iowa
Williams, Iowa
Williams, city, in Hamilton County, Iowa. Williams had 302 residents on July 1, 2025 by the Census Bureau's estimate, down 1.9% since 2020; the 2020 Census counted 307 and the ACS 2020-2024 5-year estimates put it at 369 (±96). GEOID 1985800.
Residents, July 2025 estimate
302
Census Bureau estimate (no margin published)
2020 Census count: 307 · ACS 2020-2024: 369 ±96
Median household income
$55,417
±$22,364 (90% margin)
Iowa: $75,059
Median home value
$85,900
±$5,097 (90% margin)
Iowa: $208,000
Median gross rent
$704
±$145 (90% margin)
Iowa: $972
Where is Williams and what county is it in?
Williams is a city in Hamilton County, Iowa. It covers 0.8 square miles of land, 362 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 Williams, and is it growing?
The Census Bureau estimates that 302 people lived in Williams on July 1, 2025, down 1.9% since 2020, while Iowa grew 1.5%. The 2020 Census counted 307 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 369 (±96).
| Measure | Williams | Hamilton County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 369 ±96 | 14,886 | no clear change |
| Households | 183 ±50 | 6,434 | no clear change |
| Average household size | 2.02 ±0.34 | 2.28 | no clear change |
| Housing units | 195 ±49 | 7,040 | no clear change |
Williams's population since 2000
From 427 in 2000 to 302 in 2025: down 29.3%. The 2000, 2010 and 2020 figures are census counts, each for Williams 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 Williams?
The median resident of Williams is 43.3 years old; 16.5% are under 18 and 17.9% are 65 or older. The largest group is non-Hispanic white residents at 83.7%, then non-Hispanic residents of two or more races at 9.2%.
| Measure | Williams | Hamilton County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 43.3 ±5.2 | 41.7 | no clear change |
| Under 18 years | 16.5% ±5.5 pts | 23.8% | – |
| 65 years and over | 17.9% ±7.0 pts | 21.2% | – |
| Male | 58.5% ±5.9 pts | 51.5% | – |
| Hispanic or Latino (any race) | 7.0% ±7.8 pts | 10.1% | – |
| White alone, not Hispanic | 83.7% ±8.7 pts | 83.8% | no clear change |
| Black or African American alone, not Hispanic | 0.0% ±6.5 pts | 1.0% | – |
| Asian alone, not Hispanic | 0.0% ±6.5 pts | 2.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±6.5 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±6.5 pts | 0.1% | – |
| Two or more races, not Hispanic | 9.2% ±6.6 pts | 2.2% | – |
| Some other race alone, not Hispanic | 0.0% ±6.5 pts | 0.4% | – |
| Born outside the United States | 1.6% ±2.1 pts | 6.4% | – |
| Speak a language other than English at home (age 5+) | 8.2% ±7.5 pts | 10.7% | – |
| Civilian veterans (age 18+) | 6.5% ±3.9 pts | 7.4% | – |
| With a disability | 12.7% ±5.9 pts | 13.4% | – |
| No health insurance coverage | 5.4% ±4.9 pts | 5.7% | – |
| High school graduate or higher (age 25+) | 95.8% ±3.3 pts | 94.4% | – |
| Bachelor's degree or higher (age 25+) | 19.4% ±9.0 pts | 22.8% | no clear change |
| Graduate or professional degree (age 25+) | 3.2% ±3.2 pts | 6.7% | – |
| Lived in the same house a year earlier | 84.3% ±8.6 pts | 92.3% | – |
| Moved from another state in the past year | 0.5% ±1.4 pts | 1.1% | – |
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 Williams earn?
Half of Williams's 183 households earn less than $55,417 a year (±$22,364), against $72,432 in Hamilton County and $75,059 in Iowa. In 2015-2019 it was $60,766 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Williams | Hamilton County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $55,417 ±$22,364 | $72,432 | no clear change |
| Mean household income | $65,572 ±$9,872 | $92,073 | – |
| Per capita income | $33,382 ±$6,068 | $40,191 | no clear change |
| People below the poverty line | 9.5% ±6.7 pts | 7.4% | – |
| Children under 18 below the poverty line | 14.8% ±16.5 pts | 5.4% | – |
| Households receiving SNAP | 10.4% ±7.6 pts | 8.0% | – |
| Households with a computer | 90.2% ±7.2 pts | 90.1% | – |
| Households with a broadband subscription | 91.8% ±6.2 pts | 84.7% | – |
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 Williams?
Owners occupy 70.5% of Williams's occupied homes and renters 29.5%. The median owner-occupied home is valued at $85,900 by its owner (±$5,097). The median renter pays $704 a month including utilities.
| Measure | Williams | Hamilton County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $85,900 ±$5,097 | $156,400 | no clear change |
| Median gross rent | $704 ±$145 | $877 | – |
| Renters paying 35% or more of income on rent | 27.5% ±21.9 pts | 23.1% | – |
| Median monthly owner costs, with a mortgage | $1,122 ±$44 | $1,345 | – |
| Owner-occupied homes | 70.5% ±13.7 pts | 73.4% | no clear change |
| Renter-occupied homes | 29.5% ±13.7 pts | 26.6% | – |
| Housing units | 195 ±49 | 7,040 | no clear change |
| Homeowner vacancy rate | 0.0% ±17.5 pts | 0.4% | – |
| Rental vacancy rate | 0.0% ±35.0 pts | 7.1% | – |
| Single-family detached homes | 82.6% ±10.4 pts | 80.7% | – |
| Mobile homes | 6.2% ±8.5 pts | 1.6% | – |
| Built 2020 or later | 0.0% ±12.0 pts | 0.7% | – |
| Built 2010 to 2019 | 0.5% ±1.1 pts | 1.7% | – |
| Built 1939 or earlier | 51.3% ±12.6 pts | 41.3% | – |
| Households with no vehicle | 4.9% ±4.3 pts | 4.7% | – |
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 do people in Williams work and get to work?
76.5% of Williams's workers drive alone. The average trip to work takes 27.4 minutes.
| Measure | Williams | Hamilton County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 73.4% ±9.8 pts | 65.9% | – |
| Unemployment rate | 3.0% ±3.1 pts | 4.8% | – |
| Drove alone to work | 76.5% ±11.1 pts | 84.0% | – |
| Carpooled | 10.6% ±6.4 pts | 6.6% | – |
| Public transportation | 0.0% ±10.5 pts | 0.1% | – |
| Walked | 6.6% ±6.8 pts | 2.6% | – |
| Worked from home | 3.1% ±3.2 pts | 6.1% | – |
| Mean travel time to work | 27.4 min ±4.2 | 21.4 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 Williams?
No census tract lies mostly in Williams; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9601Hamilton County | 1,622 | $72,538 |
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 Williams) · Census block assignment files
How does Williams compare with other places in Iowa?
By the Census Bureau's July 2025 estimates, Williams is the 15,133rd-most populous of the 19,476 U.S. incorporated places that have one and the 561st-most populous of 939 in Iowa.
Williams 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 | 561st | 939 |
Williams's figures with every place in Iowa (CSV)
Every place in Iowa, sortable · Compare Williams 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 Williams?
26 of the 57 figures for Williams 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 Williams 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 Williams.