The Osceola County Courthouse in Sibley, Iowa, United States, was built in 1902.

It was listed on the National Register of Historic Places in 1981 as a part of the County Courthouses in Iowa Thematic Resource.

[4] The courthouse is a two-story stone structure built on a raised basement and capped with a flat roof.

The south elevation has a projecting pavilion with a single-story portico that features two columns and a recessed entrance.

The rotunda also features wide friezes with medallions, oval opening in the floor, wooden balusters, and brass railings.