Centralia is a city in Dubuque County, Iowa, United States.

It is part of the Dubuque, Iowa Metropolitan Statistical Area.

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

There were 50 housing units at an average density of 80.5 per square mile (31.1/km2).

There were 54 housing units at an average density of 93.1 per square mile (35.9/km2).

19.2% of all households were made up of individuals, and 1.9% had someone living alone who was 65 years of age or older.

There were 40 housing units at an average density of 72.8 per square mile (28.1/km2).

15.8% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older.

There were 6.5% of families and 13.8% of the population living below the poverty line, including 24.4% of under eighteens and 22.2% of those over 64.