Earlville is a city in Delaware County, Iowa, United States.

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

There were 339 housing units at an average density of 615.6 per square mile (237.7/km2).

Hispanic or Latino persons of any race comprised 2.2% of the population.

There were 354 housing units at an average density of 643.6 per square mile (248.5/km2).

24.2% of all households were made up of individuals, and 11.8% had someone living alone who was 65 years of age or older.

There were 355 housing units at an average density of 650.0 per square mile (251.0/km2).

21.9% of all households were made up of individuals, and 13.0% had someone living alone who was 65 years of age or older.

[13] St. Joseph School, under the Roman Catholic Archdiocese of Dubuque, was in Earlville.