Arion is a city in Crawford County, Iowa, United States, along the Boyer River.

[4] According to the United States Census Bureau, the city has a total area of 0.48 square miles (1.24 km2), all land.

There were 47 housing units at an average density of 94.7 per square mile (36.6/km2).

Hispanic or Latino persons of any race comprised 6.2% of the population.

There were 48 housing units at an average density of 100.0 per square mile (38.6/km2).

30.2% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older.

There were 61 housing units at an average density of 128.4 per square mile (49.6/km2).

25.0% of all households were made up of individuals, and 1.8% had someone living alone who was 65 years of age or older.

There were 23.3% of families and 27.7% of the population living below the poverty line, including 38.6% of under eighteens and 50.0% of those over 64.