Purdin is a city in northwest Linn County, Missouri, United States.

[7] According to the United States Census Bureau, the city has a total area of 0.31 square miles (0.80 km2), all land.

34.2% of all households were made up of individuals, and 19% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 99.10% White, 0.45% African American, and 0.45% from two or more races.

37.5% of all households were made up of individuals, and 26.0% had someone living alone who was 65 years of age or older.

About 27.9% of families and 28.1% of the population were below the poverty line, including 36.1% of those under the age of eighteen and 9.8% of those 65 or over.