Blockton is a city in Taylor County, Iowa, United States.

After the Mormons left the area, the Chicago Great Western Railway was built through the town and it was renamed Blockton in honor of W. T. Block, a railroad official.

According to the United States Census Bureau, the city has a total area of 0.65 square miles (1.68 km2), all land.

There were 84 housing units at an average density of 131.7 per square mile (50.8/km2).

Hispanic or Latino persons of any race comprised 2.4% of the population.

There were 110 housing units at an average density of 169.2 per square mile (65.3/km2).

The racial makeup of the city was 99.5% White and 0.5% Native American.

There were 112 housing units at an average density of 173.1 per square mile (66.8/km2).

About 12.7% of families and 20.0% of the population were below the poverty line, including 33.9% of those under the age of eighteen and 20.5% of those sixty five or over.