Millerton is a city in Wayne County, Iowa, United States.

[3] According to the United States Census Bureau, the city has a total area of 0.21 square miles (0.54 km2), all land.

There were 24 housing units at an average density of 82.3 per square mile (31.8/km2).

Hispanic or Latino persons of any race comprised 0.0% of the population.

There were 26 housing units at an average density of 123.8 per square mile (47.8/km2).

22.2% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.

There were 28 housing units at an average density of 134.2 per square mile (51.8/km2).

54.5% of all households were made up of individuals, and 40.9% had someone living alone who was 65 years of age or older.