Breitenbach is a municipality in the district of Thierstein in the canton of Solothurn in Switzerland. There are two train stations near Breitenbach, the main being in Laufen and the other in Zwingen. As with most of Switzerland, there are Postauto buses which take people to surrounding cities and to and from the train station. Schweizerdeutsch in Breitenbach closely resembles that of Baseldeutsch.