Plainview is an unincorporated community and census-designated place in Cleona and Hickory Grove Townships, Scott County, Iowa, United States. Plainview is located along Iowa Highway 130 5.7 miles (9.2 km) north of Walcott.

Historical population

Census	Pop.	Note	%±
2020	19		—
U.S. Decennial Census

As of the census of 2020, there were 19 people, 11 households, and 9 families residing in the community. The population density was 34.4 inhabitants per square mile (13.3/km). There were 12 housing units at an average density of 21.7 per square mile (8.4/km). The racial makeup of the community was 89.5% White, 0.0% Black or African American, 0.0% Native American, 0.0% Asian, 0.0% Pacific Islander, 0.0% from other races and 10.5% from two or more races. Hispanic or Latino persons of any race comprised 0.0% of the population.

Of the 11 households, 54.5% of which had children under the age of 18 living with them, 81.8% were married couples living together, 0.0% were cohabitating couples, 0.0% had a female householder with no spouse or partner present and 18.2% had a male householder with no spouse or partner present. 18.2% of all households were non-families. 18.2% of all households were made up of individuals, 0.0% had someone living alone who was 65 years old or older.

The median age in the community was 57.3 years. 5.3% of the residents were under the age of 20; 0.0% were between the ages of 20 and 24; 31.6% were from 25 and 44; 26.3% were from 45 and 64; and 36.8% were 65 years of age or older. The gender makeup of the community was 57.9% male and 42.1% female.

Plainview's population was 27 in 1902, and 225 in 1925. The population was 18 in 1940.

Plainview was an incorporated community until 1987.