Blencoe is a city in Monona County, Iowa, United States.

[4] According to the United States Census Bureau, the city has a total area of 0.76 square miles (1.97 km2), all land.

There were 112 housing units at an average density of 147.4 per square mile (56.9/km2).

There were 116 housing units at an average density of 152.6 per square mile (58.9/km2).

The racial makeup of the city was 96.9% White, 0.4% Native American, 0.4% Asian, and 2.2% from two or more races.

25.3% of all households were made up of individuals, and 8.1% had someone living alone who was 65 years of age or older.

35.5% of all households were made up of individuals, and 24.5% had someone living alone who was 65 years of age or older.

About 4.7% of families and 7.6% of the population were below the poverty line, including 12.9% of those under the age of eighteen and 2.5% of those 65 or over.