Merrill is a city in Plymouth County, Iowa, United States, along the Floyd River.

[1] In 2007, the city hired Drake University public relations seniors to research and develop strategies to attract new residents.

[5] According to the United States Census Bureau, the city has a total area of 0.57 square miles (1.48 km2), all land.

[6] It is located near the Floyd River, and is on U.S. Route 75, 20 minutes north of Sioux City.

There were 315 housing units at an average density of 607.3 per square mile (234.5/km2).

There were 317 housing units at an average density of 556.1 per square mile (214.7/km2).

The racial makeup of the city was 97.9% White, 0.7% Native American, 0.5% Asian, and 0.9% from two or more races.

28.0% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.

24.3% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.