Calmar[a] is a city in Winneshiek County, Iowa, United States.

It was named after Calmar, today spelled Kalmar, a city in Sweden.

[8] According to the United States Census Bureau, the city has a total area of 1.07 square miles (2.77 km2), all land.

There were 524 housing units at an average density of 474.0 per square mile (183.0/km2).

Hispanic or Latino persons of any race comprised 3.8% of the population.

There were 492 housing units at an average density of 459.8 per square mile (177.5/km2).

31.5% of all households were made up of individuals, and 10.8% had someone living alone who was 65 years of age or older.

There were 482 housing units at an average density of 458.7 per square mile (177.1/km2).

30.3% of all households were made up of individuals, and 14.6% had someone living alone who was 65 years of age or older.

Calmar is home to one of two campuses of Northeast Iowa Community College.

[15] In 2019 CFS and St. Theresa of Calcutta in Ossian announced plans to consolidate into a single school, with the Calmar campus closing.