Lancaster is a city in Atchison County, Kansas, United States.

[7] In 1915, Lancaster contained seven stores, a school, three churches, a grain elevator, a lumber yard, and a hotel.

[8] According to the United States Census Bureau, the city has a total area of 0.22 square miles (0.57 km2), all land.

[9] The 2020 United States census counted 246 people, 109 households, and 73 families in Lancaster.

There were 109 housing units at an average density of 547.7 per square mile (211.5/km2).

29.4% of households consisted of individuals and 10.1% had someone living alone who was 65 years of age or older.

There were 117 housing units at an average density of 531.8 per square mile (205.3/km2).

16.7% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older.

21.5% of all households were made up of individuals, and 12.1% had someone living alone who was 65 years of age or older.

About 10.4% of families and 11.6% of the population were below the poverty line, including 14.4% of those under the age of eighteen and 4.7% of those 65 or over.