Blairstown is a village in Henry County, Missouri, United States.

[5] The city was named after railroad magnate John Insley Blair.

[6] According to the United States Census Bureau, the city has a total area of 0.25 square miles (0.65 km2), all land.

29.3% of all households were made up of individuals, and 2.4% had someone living alone who was 65 years of age or older.

30.4% of all households were made up of individuals, and 12.5% had someone living alone who was 65 years of age or older.

There were 13.6% of families and 21.2% of the population living below the poverty line, including 28.8% of under eighteens and 10.5% of those over 64.