Ollie is a city in Keokuk County, Iowa, United States. The population was 215 at the 2010 census. Originally known as Hemingford, the town voted to change the name to Ollie in 1892.
Ollie is located at 41°11′52″N 92°5′39″W (41.197685, -92.094125).
According to the United States Census Bureau, the city has a total area of 0.99 square miles (2.56 km2), all of it land.
As of the census of 2010, there were 215 people, 97 households, and 58 families living in the city. The population density was 217.2 inhabitants per square mile (83.9/km2). There were 108 housing units at an average density of 109.1 per square mile (42.1/km2). The racial makeup of the city was 99.1% White, 0.5% Asian, and 0.5% from two or more races.
There were 97 households, of which 22.7% had children under the age of 18 living with them, 51.5% were married couples living together, 6.2% had a female householder with no husband present, 2.1% had a male householder with no wife present, and 40.2% were non-families. 33.0% of all households were made up of individuals, and 12.4% had someone living alone who was 65 years of age or older. The average household size was 2.22 and the average family size was 2.74.