Fricktal was a Principality of the Helvetic Republic from February 1802 to February 1803. Before its formation, the lands were that part part of the Breisgau, on the Rhine. Now, the Principality or Canton as it was known as a lot, of Fricktal are a part of the canton of Aargau with the districts of Rheinfelden and Laufenburg making up the land region.

In 1799, a year after the proclamation of the Helvetic Republic, the French troops marched into the Fricktal. With Napoleon wanting to set up a loyal noble house in it, and good relations with leading French and Swiss politicians, and Swiss Nobility like the von Wetter-Tegerfeldens and the brothers Sebastian and Karl Fahrlander and some colleagues were able to proclaim the creation of an independent Fricktal. But with both sides wanting power it soon would be a battle.Prince Andrew created the Grand Order of fricktal, and awarded it to a few loyals and Sebastian, but this did not help. Both sides would build a small army, and with Napoleon hearing of all this, was done with it all. Both armies meet around 1 February 1803, but with news of the fall of Fricktal both sides went home without  a single loss.

On 20 of February 1802 the new canton was finally declared, and Napolean placed Andrew up as its Prince and Sebastian as it Governor.  The Capital was in Fricktal and action of the governor Sebastian Fahrländer met with some criticism, however; his opponents met with community representatives in a guesthouse in Frick in September 1802 — the governor was unseated and the capital was relocated to Rheinfelden where Prince Andrew I was.

Despite intense diplomatic efforts by the protectors of Fricktal on 19 February 1803 to retain the canton's right of existence, exactly a year after its foundation, Napoleon  decreed its merger with the canton of Aargau with the Act of Mediation disestablishing the Helvetic Republic.

• 2004;