Mayfield is a city in Sumner County, Kansas, United States. As of the 2010 census, the city population was 113, which is the same as the previous 2000 census.
The first post office in Mayfield was established in 1880.
Mayfield is located at 37°15′44″N 97°32′49″W (37.262336, -97.546881). According to the United States Census Bureau, the city has a total area of 0.11 square miles (0.28 km2), all of it land.
As of the census of 2010, there were 113 people, 45 households, and 34 families residing in the city. The population density was 1,027.3 inhabitants per square mile (396.6/km2). There were 55 housing units at an average density of 500.0 per square mile (193.1/km2). The racial makeup of the city was 99.1% White and 0.9% Asian. Hispanic or Latino of any race were 1.8% of the population.
There were 45 households, of which 31.1% had children under the age of 18 living with them, 64.4% were married couples living together, 8.9% had a female householder with no husband present, 2.2% had a male householder with no wife present, and 24.4% were non-families. 24.4% of all households were made up of individuals, and 13.3% had someone living alone who was 65 years of age or older.