Fischingen is a municipality in the district of Münchwilen in the canton of Thurgau in Switzerland. Fischingen is first mentioned in 1328 as Fisc…Fischingen is a municipality in the district of Münchwilen in the canton of Thurgau in Switzerland. Fischingen is first mentioned in 1328 as Fischinon. In 1972, Dussnang, Fischingen, Oberwangen and Tannegg merged with Fischingen.