Monona is a city in Clayton County, Iowa, United States.

[3] The Monona Post Office was established in 1849[4] and the city was incorporated May 11, 1897.

[5] In 1916, Monona contained a public house, two stores, and several mechanic shops.

[7] According to the United States Census Bureau, the city has a total area of 1.17 square miles (3.03 km2), all land.

[8] As of the census of 2020,[10] there were 1,471 people, 671 households, and 392 families residing in the city.

There were 720 housing units at an average density of 559.3 per square mile (216.0/km2).

At the 2010 census there were 1,549 people, 675 households, and 440 families living in the city.

There were 725 housing units at an average density of 619.7 per square mile (239.3/km2).

There were 706 housing units at an average density of 612.4 per square mile (236.4/km2).