Reasnor is a city in Jasper County, Iowa, United States.

[2] Reasnor was platted in the summer of 1877, and named for its founders, Samuel and Mary Reasoner.

[5] According to the United States Census Bureau, the city has a total area of 0.55 square miles (1.42 km2), all land.

[6] As of the census of 2020,[8] there were 152 people, 68 households, and 47 families residing in the city.

There were 69 housing units at an average density of 124.2 per square mile (48.0/km2).

There were 78 housing units at an average density of 141.8 per square mile (54.7/km2).

26.5% of all households were made up of individuals, and 14.7% had someone living alone who was 65 years of age or older.

29.9% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older.

About 1.9% of families and 4.2% of the population were below the poverty line, including 4.9% of those under the age of eighteen and 10.0% of those 65 or over.