Renwick is a city in Humboldt County, Iowa, United States. The population was 234 at the time of the 2020 census.
History
Renwick was platted in 1882.
In 1970 the population was 480. By 1987, this was down to 350. By then, there was no longer a bank branch that provided all services for customers, nor was there a hardware store. Bob Secter of the Los Angeles Times stated that year that Renwick was "already a shadow of what it was a decade ago."
Geography
According to the United States Census Bureau, the city has a total area of , all land.
Renwick's population density is estimated at 261 people per square mile, which is considered very low for urban areas.