Mildred a census-designated place (CDP) in Allen County, Kansas, United States.

Mildred was founded in 1907 by Sam Dermott for the Great Western Cement Company.

[4] The community was named for the daughter of J. W. Wagner a local industrialist, and the president of the cement company.

[7] According to the United States Census Bureau, the community has a total area of 0.21 square miles (0.54 km2), all of it land.

[2] The 2020 United States census counted 25 people, 6 households, and 4 families in Mildred.

33.3% of households consisted of individuals and 33.3% had someone living alone who was 65 years of age or older.

57.1% of all households were made up of individuals, and 21.4% had someone living alone who was 65 years of age or older.

52.6% of all households were made up of individuals, and 15.8% had someone living alone who was 65 years of age or older.

There were 16.7% of families and 15.6% of the population living below the poverty line, including 18.2% of under eighteens and none of those over 64.

The community is served by Marmaton Valley USD 256 public school district.