Grafton is a city in Worth County, Iowa, United States.

Grafton got its start in the year 1878, following construction of the Chicago, Milwaukee and St. Paul Railway through that territory.

[4] According to the United States Census Bureau, the city has a total area of 0.33 square miles (0.85 km2), all land.

There were 118 housing units at an average density of 367.9 per square mile (142.1/km2).

There were 126 housing units at an average density of 381.8 per square mile (147.4/km2).

34.2% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.

27.7% of all households were made up of individuals, and 14.3% had someone living alone who was 65 years of age or older.

About 2.4% of families and 5.8% of the population were below the poverty line, including 8.9% of those under the age of eighteen and 6.2% of those 65 or over.