Eiken is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland.HistoryThe land was probably already occupied in the Roman era and individual objects from the Alamanni and Frankish Empire eras. Eiken is first mentioned in the first half of the 12th Century as Eitchon. The municipality of Sisseln was originally an expansion of Eichen, and it remained part of the municipality until 1806, when it became independent.Under the Habsburgs, Eichen was the center of the bailiwick of Eichen. The municipality bought its own Twingherrschaft, which gave it local self-rule and limited court rights, in the 16th century. Eiken belonged to the Austrian Fricktal until 1803 when it went to the newly formed canton of Aargau.Some time before 1228 the Knight Rudolf Möhlin, was granted the patronage of his own church by St. Martin Church of Rheinfelden. This patronage included the Church of Eiken until 1868. Between 1871-73 Eiken built a new church, which was consecrated in 1891 to St. Vincent, Joseph and Mary. The Catholic parish of Eiken includes the municipalities of Münchwilen and Sisseln.