Harper is a city in Keokuk County, Iowa, United States.

[3] According to the United States Census Bureau, the city has a total area of 0.09 square miles (0.23 km2), all of it land.

There were 56 housing units at an average density of 622.2 per square mile (240.2/km2).

36.7% of all households were made up of individuals, and 18.4% had someone living alone who was 65 years of age or older.

There were 61 housing units at an average density of 693.6 per square mile (267.8/km2).

20.0% of all households were made up of individuals, and 12.7% had someone living alone who was 65 years of age or older.

There were 4.9% of families and 4.5% of the population living below the poverty line, including 3.9% of under eighteens and none of those over 64.

[9] The Saints Peter and Paul cemetery is the final resting place of eight Hammes children who all died in a tragic car-train accident in October 1956.