Oberwil im Simmental is a municipality in the Frutigen -Niedersimmental administrative district in the Canton of Bern in Switzerland .

Oberwil is first mentioned in 1278 as Oberwile.

During the Paleolithic era (20,000-10,000 BC) humans lived in several caves above the valley floor during the summer. The caves, Schnurenloch, Mamilchloch, Zwergliloch and Chniechälebalm, contained about 5,000 bones from the now extinct cave bear which the inhabitants had butchered. While no human remains were discovered, a number of stone tools were found. Today the tools and bones are at the Historical Museum of Bern while the caves can be visited with tour groups.