In 2023, Onslow, IA had a population of 306 people with a median age of 28 and a median household income of $42,813. Between 2022 and 2023 the population of Onslow, IA declined from 319 to 306, a −4.08% decrease and its median household income grew from $40,588 to $42,813, a 5.48% increase.
The 5 largest ethnic groups in Onslow, IA are White (Non-Hispanic) (92.2%), Black or African American (Non-Hispanic) (2.94%), American Indian & Alaska Native (Non-Hispanic) (2.61%), Two+ (Hispanic) (2.29%), and White (Hispanic) (0%).
None of the households in Onslow, IA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
99.7% of the residents in Onslow, IA are U.S. citizens.
In 2023, the median property value in Onslow, IA was $96,500, and the homeownership rate was 82.5%.
Most people in Onslow, IA drove alone to work, and the average commute time was 29.2 minutes. The average car ownership in Onslow, IA was 2 cars per household.