Wallingford is a town in Rutland County, Vermont, United States. Wallingford also contains the villages of East Wallingford and South Wallingford. According to the United States Census Bureau, the town has a total area of 43.5 square miles (112.5 square kilometers), of which, 43.2 square miles (112.0 square kilometers) of it is land and 0.2 square miles (0.5 square kilometers) of it (0.48%) is water. There were 1,040 housing units at an average density of 24.1 per square mile (9.3/square kilometers). The racial makeup of the town was 98.86% White, 0.13% Black or African American, 0.22% Asian, 0.04% Pacific Islander, 0.04% from other races, and 0.70% from two or more races.