Olsburg is a city in Pottawatomie County, Kansas, United States.

[7] According to the United States Census Bureau, the city has a total area of 0.19 square miles (0.49 km2), all land.

[8] Olsburg is part of the Manhattan, Kansas Metropolitan Statistical Area.

The 2020 United States census counted 218 people, 85 households, and 64 families in Olsburg.

There were 98 housing units at an average density of 405.0 per square mile (156.4/km2).

21.2% of households consisted of individuals and 10.6% had someone living alone who was 65 years of age or older.

27.1% of all households were made up of individuals, and 9.5% had someone living alone who was 65 years of age or older.

18.8% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older.

Out of the total population, none of those under the age of 18 and 19.1% of those 65 and older were living below the poverty line.

The community is served by Blue Valley USD 384 public school district.