Möhlin (German pronunciation: [ˈmøːlin]) is a municipality in the district of Rheinfelden in the canton of Aargau in Switzerland.

During the Early to High Middle Ages it was the site of fortified refuge.

[3] In the 13th century a knight in the service of the House of Zähringen and a 15th-century Rheinfeld Schultheiss (mayor) both had the name von Meli, which is derived from Möhlin.

Jurors (a group of men of good character that were used to investigate crimes and/or judge the accused) from Möhlin are first mentioned in 1473.

In 1803 the entire Fricktal, including Möhlin, joined the newly founded Canton of Aargau.

In 1314 the patronage of the church was granted by the Abbey of Ettenheim in Breisgau to James of Wart.

The factory buildings and the surrounding residential areas were modeled on the original urban design of the city of Zlín, Czechoslovakia.

Möhlin has an area, as of 2009[update], of 18.79 square kilometers (7.25 sq mi).

[4] The municipality is located in the Rheinfelden district, along the Möhlinbach (Möhlin stream).

The blazon of the municipal coat of arms is Gules a garb Or ensigned with a Sickle Azure handled Sable.

[8] The age distribution, as of 2008[update], in Möhlin is; 1,042 children or 10.9% of the population are between 0 and 9 years old and 1,148 teenagers or 12.0% are between 10 and 19.

[10] About 46% of the total households were owner occupied, or in other words did not pay rent (though they may have a mortgage or a rent-to-own agreement).

[8] The historical population is given in the following table:[3][9] The Bata factory at Batastrasse (719, 743) and three parts of the Roman era Rhine fortifications (the Fahrgraben, the Bürkli in the hamlet of Riburg, and the lower Wehren) are all listed as Swiss heritage sites of national significance.

[8] From the 2000 census[update], 3,121 or 37.6% were Roman Catholic, while 2,381 or 28.7% belonged to the Swiss Reformed Church.