Monona is a city in Clayton County, Iowa, United States. The population was 1,549 at the 2010 census.
The name Monona is of American Indian origin.
In 1916, Monona contained a public house, two stores, and several mechanic shops.
Monona is located at 43°3′5″N 91°23′26″W (43.051258, -91.390529).
According to the United States Census Bureau, the city has a total area of 1.17 square miles (3.03 km2), all land.
At the 2010 census there were 1,549 people, 675 households, and 440 families living in the city. The population density was 1,323.9 inhabitants per square mile (511.2/km2). There were 725 housing units at an average density of 619.7 per square mile (239.3/km2). The racial makup of the city was 98.3% White, 0.5% African American, 0.1% Native American, 0.3% Asian, 0.3% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 1.0%.
Of the 675 households 29.5% had children under the age of 18 living with them, 52.1% were married couples living together, 8.7% had a female householder with no husband present, 4.3% had a male householder with no wife present, and 34.8% were non-families. 30.8% of households were one person and 16.6% were one person aged 65 or older. The average household size was 2.29 and the average family size was 2.83.
The median age was 42.4 years.