Zuzgen (Swiss German: [ˈtsʊtsɡə]) is a municipality in the Rheinfelden District of canton Aargau in Switzerland.

The village lies in the mid-reaches of the Möhlin valley (Möhlintal) through which flows the Möhlinbach in a northwesterly direction towards the Rhine.

The flat valley floor alongside the Möhlinbach is, on average, close to 200 meters wide and is bordered on both sides by the hills of the Tabel Jura (Tafeljura) which have very steep lower slopes leading to flat upper plateau's that are intensively farmed.

Of the rest of the land, 0.45 km2 (0.17 sq mi) or 5.4% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.1% is either rivers or lakes.

Neighbouring villages in Canton Aargau are Zeiningen to the Northwest, Mumpf to the North, Obermumpf to the Northeast, and Hellikon to the Southeast.

The area around Zuzgen is known to be settled in Roman times; coins and the remains of a wall provide evidence.

The first documented mention of Zuzchon dates from 10 June 1288 in a charter of the Sovereign Military Order of Malta command in Rheinfelden.

Following the country reforms of the Austrian King Maximilian I., Hellikon fell under the authority of "Further Austria" in 1491.

During the Rappenkrieg, a peasant uprising that lasted from 1612 until 1614, and the Thirty Years' War (1633–38) the village's economic development went into decline.

On 20 February 1802, Rheinfelden was made a district capital of the newly created Canton of Fricktal, (Principality of Frickgau), joining the Helvetic Republic in August.

At the beginning of the 1980s strong building activity started, and ever more people moved from Basel and its suburbs into the village.

The blazon of the municipal coat of arms is Azure five Pine Trees Vert issuant from three Mounts of the same the middle one being lower and in chief a Mullet Or[4] or "Over blue, three green hills with five green trees under a yellow six pointed start".

The heraldry is an inappropriate choice because the colours neutralise each other and the flag cannot be seen when flown form a distance.

[8] The age distribution, as of 2008[update], in Zuzgen is; 109 children or 12.9% of the population are between 0 and 9 years old and 104 teenagers or 12.3% are between 10 and 19.

Connection with the public transport network is through the Postauto bus route in either the direction of Möhlin or Weggenstetten.

Thanks to an inter-cantonal agreement, youngsters from the Fricktal may attend the college in Muttenz (canton Baselland).