Frankfort is a city in Marshall County, Kansas, United States.

[3] Frankfort was laid out in 1867 when the Central Branch Union Pacific Railroad was built through the area.

[4] The nearby post office of Nottingham, established in 1857, moved roughly a half-mile northwest to meet the railroad.

[6] The town lost 32 men during World War II, more per capita than any other community in the USA.

[8] The 2020 United States census counted 730 people, 311 households, and 198 families in Frankfort.

32.2% of households consisted of individuals and 14.8% had someone living alone who was 65 years of age or older.

The racial makeup of the city was 98.8% White, 0.6% African American, 0.1% Asian, and 0.6% from two or more races.

33.2% of all households were made up of individuals, and 20.8% had someone living alone who was 65 years of age or older.

34.3% of all households were made up of individuals, and 24.5% had someone living alone who was 65 years of age or older.

The community and nearby rural areas are served by Vermillion USD 380 public school district.

Both teams were coached by Larry Schroeder, a member of the KSHSAA Hall of Fame.