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Onslow, IA

Population
197
U.S. Census Population Estimates Program · 2025
Elevation
925 ft
Median Home Value
$100,000
U.S. Census American Community Survey 5-Year · 2024
Median Rent
$1,250/mo
U.S. Census American Community Survey 5-Year · 2024
Median Income
$65,313
U.S. Census American Community Survey 5-Year · 2024

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Onslow in context.

OverallBest places in IowaPopulation rankingHighest population places in IowaNearest larger communityMarion, Iowa30 miles away · 42,732 residents.

About Onslow

Onslow is a city in Jones County, Iowa, United States. The 2020 census counted 201 residents. Onslow is part of the Cedar Rapids metropolitan area. Onslow was platted in 1871 by E. The through line in Onslow is the way its history and present-day settings remain visible on the same map. Onslow makes the most sense through those concrete details, with its history still visible in the settings people use today.

Top Rating Signals

Highest current ratings for this town.

Lower County Wildfire Hazard Potential ClassA+100.0ratingLower Projected Late-Century County-Area Exposure to Sea-Level RiseA+100.0ratingLow PopulationA+100.0rating

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