Olsburg is a city in Pottawatomie County, Kansas, United States. The population was 192 at the 2000 census, unchanged from 1990. It is part of the Manhattan, Kansas Metropolitan Statistical Area.
Olsburg is located at 39°25′52″N 96°36′52″W / 39.43111°N 96.61444°W / 39.43111; -96.61444 (39.431052, -96.614439).
According to the United States Census Bureau, the city has a total area of 0.2 square miles (0.4 km²), all of it land.