Editing Williams, Iowa (section)

=== 2020 census ===
As of the 2020 [[Census]],<ref>{{Cite web |title=Explore Census Data |url=https://data.census.gov/profile/Williams_city,_Iowa?g=1600000US1985800 |access-date=2022-12-07 |website=data.census.gov}}</ref> the total population was 307 people. The population density was 352.87 people per square mile, spread over 0.87 miles. Of those 307 people, the median age was 44.3 years old, with 18.3% of the town's population under the age of 18, 64.3% between the ages of 18 and 64, and 17.4% of the population over the age of 65. There were a total of 128 households, with an average of 3.15 people per household.

The racial makeup of the town was 91.85% White, less than 1% African American, 5.53% mixed race, and 5.86% Hispanic.

The average income per capita of Williams was $22,410, which is lower than the state average, and the median household income was $53,750, which is lower than the rest of the state. Only 6.4% of the town’s population lives under the poverty line, which is far lower than the rest of the state.

55.6% of the population of the town is identified as currently married.

95.8% of the 2020 population has received a high school degree, which is 3.3 percentage points higher than the rest of the state. Williams has a lower-than-average percentage of the population having received college degrees, with only 13.2% of the town's population having received a bachelor’s degree compared to the state average of 30.5%.

4.9% of the town's population were veterans.