Dedham is a city in Carroll County, Iowa, United States.

[3] Dedham got its start in the year 1881, following construction of the Chicago, Milwaukee and St. Paul Railway through that territory.

[6] The present church was dedicated on October 1, 1940, by Bishop Edmond Heelan.

According to the United States Census Bureau, the city has a total area of 0.58 square miles (1.50 km2), all land.

As of the census of 2020,[9] there were 224 people, 83 households, and 56 families residing in the city.

There were 100 housing units at an average density of 181.0 per square mile (69.9/km2).

There were 107 housing units at an average density of 184.5 per square mile (71.2/km2).

30.7% of all households were made up of individuals, and 14.8% had someone living alone who was 65 years of age or older.

There were 117 housing units at an average density of 202.1 per square mile (78.0/km2).

36.3% of all households were made up of individuals, and 19.5% had someone living alone who was 65 years of age or older.

About 7.9% of families and 9.9% of the population were below the poverty line, including 15.3% of those under the age of eighteen and 9.4% of those 65 or over.