Onslow is a city in Jones County, Iowa, United States. The population was 201 at the time of the 2020 census. It is part of the Cedar Rapids metropolitan area.
History
Onslow was platted in 1871 by E. M. Franks.
Geography
Onslow is located at (42.105603, -91.015158).
According to the United States Census Bureau, the city has a total area of , all land.