Lüterkofen-Ichertswil is a municipality in the district of Bucheggberg, in the canton of Solothurn, Switzerland. It was formed in 1961 from the merger of the two previously independent municipalities of Lüterkofen and Ichertswil.

Küttigkofen is a former municipality in the district of Bucheggberg, in the canton of Solothurn, Switzerland. On 1 January 2014 the former municipalities of Küttigkofen, Tscheppach, Brügglen, Aetingen, Aetigkofen, Bibern (SO), Gossliwil, Hessigkofen, Mühledorf (SO), Kyburg-Buchegg merged into the new municipality of Buchegg.