Quimby is a city in Cherokee County, Iowa, United States. The population was 319 at the 2010 census.
Quimby is located at 42°37′47″N 95°38′34″W (42.629770, -95.642846). It is situated near the Little Sioux River.
According to the United States Census Bureau, the city has a total area of 0.41 square miles (1.06 km2), all land.
As of the census of 2010, there were 319 people, 135 households, and 95 families residing in the city. The population density was 778.0 inhabitants per square mile (300.4/km2). There were 152 housing units at an average density of 370.7 per square mile (143.1/km2). The racial makeup of the city was 99.4% White and 0.6% Asian. Hispanic or Latino of any race were 1.3% of the population.
There were 135 households, of which 25.9% had children under the age of 18 living with them, 57.8% were married couples living together, 7.4% had a female householder with no husband present, 5.2% had a male householder with no wife present, and 29.6% were non-families.