Wallingford is a city in Emmet County, Iowa, United States. The population was 197 at the 2010 census.
Wallingford was platted in 1882.
Wallingford is located at 43°19′9″N 94°47′36″W (43.319163, -94.793331).
According to the United States Census Bureau, the city has a total area of 0.97 square miles (2.51 km2), all land.
As of the census of 2010, there were 197 people, 79 households, and 54 families living in the city. The population density was 203.1 inhabitants per square mile (78.4/km2). There were 87 housing units at an average density of 89.7 per square mile (34.6/km2). The racial makeup of the city was 99.5% White and 0.5% African American. Hispanic or Latino of any race were 0.5% of the population.
There were 79 households of which 32.9% had children under the age of 18 living with them, 57.0% were married couples living together, 6.3% had a female householder with no husband present, 5.1% had a male householder with no wife present, and 31.6% were non-families. 26.6% of all households were made up of individuals and 6.3% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.96.