Monroe is a city in Jasper and Marion counties in Iowa, United States.

Monroe's longitude and latitude coordinates in decimal form are 41.521880, -93.103492.

[5] According to the United States Census Bureau, the city has a total area of 1.69 square miles (4.38 km2), all land.

There were 857 housing units at an average density of 504.8 per square mile (194.9/km2).

Hispanic or Latino persons of any race comprised 1.2% of the population.

There were 839 housing units at an average density of 496.4 per square mile (191.7/km2).

26.6% of all households were made up of individuals, and 10.8% had someone living alone who was 65 years of age or older.

There were 802 housing units at an average density of 473.6 per square mile (182.9/km2).

27.1% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.