Rosalia Township was created in 1871.

The township was named after the town of Rosalia, which was named in honor of the wife of its first postmaster.

[1] Rosalia Township covers an area of 62.98 square miles (163.1 km2) and contains no incorporated settlements.

The streams of De Haas Creek, Middle Branch Little Walnut River and Nicholas Creek run through this township.

This article about a location in Butler County, Kansas is a stub.