| Conventional Long Name: | Department of Simplon |
| Common Name: | Simplon |
| Year Start: | 1810 |
| Year End: | 1813 |
| Flag: | Flag of France |
| Image Map Caption: | Simplon and other annexed departments |
| Official Languages: | French |
| Status: | Department of the French First Empire |
| Admin Center Type: | Chef-lieu |
| Admin Center: | Sion |
| Area Km2: | 5000 |
| Area Label: | 1812 |
| Population Census: | 65500 |
| Population Census Year: | 1812 |
| Era: | Napoleonic Wars |
| Event Start: | Annexation of the Rhodanic Republic |
| Date Start: | 13 December |
| Event End: | Occupied by Austrian forces |
| Date End: | 29 December |
| P1: | Rhodanic Republic |
| Flag P1: | Flag of Canton of Valais (1802–1815).svg |
| S1: | Restoration and Regeneration in Switzerland |
| Flag S1: | Swiss flag Bachmann 1815.png |
| Today: | Valais, Switzerland |
Simplon (in French sɛ̃.plɔ̃/) was a department of the First French Empire. It was named after the Simplon Pass . It was formed in 1810, when the Rhodanic Republic was annexed by France. Its territory corresponded with that of the present-day Swiss canton of Valais.
The chef-lieu of the department was Sion. The department was subdivided into the following three arrondissements and cantons:[1]
After the final defeat of Napoleon Bonaparte in 1815, the department was admitted to the Swiss Confederation and became the canton of Valais.
The department was created by Article 2 of the decree of 12 November 1810, reuniting the Valais to the French Empire. This decree is written as follows:
NAPOLEON, EMPEROR OF THE FRENCH, KING OF ITALY, PROTECTOR OF THE CONFEDERATION OF THE RHINE, MEDIATOR OF THE SWISS CONFEDERATION:
Considering that the Simplon Road, which unites the Empire to our Kingdom of Italy, is useful to more than sixty million men; that it cost our treasures in France and Italy more than eighteen million, an expense which would become useless if commerce could find there no convenience and perfect security;
That the Valais did not fulfill any of the engagements it had contracted when we had the work begun to open this great communication;
Wanting moreover to put an end to the anarchy which afflicts this country, and to cut short the abusive pretensions of sovereignty of a part of the population on the other,
We have decreed and ordered, decree and order the following:
FIRST ARTICLE. - The Valais is reunited to the Empire.
ART. 2. - This territory will form a department under the name of Department of Simplon.
ART. 3. - This department will be part of the seventh military division.
ART. 4. - It will be taken possession, without delay, on our behalf, and a general commissioner will be in charge of administering it throughout the rest of this year.
ART. 5. - All our ministers will be charged with the execution of this decree.
Signed: Napoleon
By the Emperor: The Minister Secretary of State,
Signed: Hugues-Bernard Maret, Duke of Bassano
This decree was confirmed by the organic senatus-consulte of 13 December 1810. This senatus-consulte is written as follows:
FIRST ARTICLE. - The Valais is reunited to the territory of the French Empire.
ART. 2. - It will form a department under the name of Department of Simplon.
ART. 3. - The department of Simplon will have a deputy in the Legislative Body. - This deputy will be appointed in 1811: he will be renewed in the year of the fourth series, to which the Department of Simplon will belong.
ART. 4. - The Department of Simplon will be the jurisdiction of the imperial court of Lyon.
The prefect (préfet) was the highest state representative in the department. The holder of the office was also subprefect of Sion.
| Term start | Term end | Office holder | |
|---|---|---|---|
| 11 January 1811[2] | 13 November 1811 | Claude Joseph Parfait Derville-Maléchard | |
| 13 November 1811[3] | 29 December 1813 | Claude-Philibert Barthelot de Rambuteau |
The secretary-general was the deputy to the prefect.
The Simplon was represented in the Empire's Corps Legislatif by Charles Emmanuel de Rivaz, a cousin of Isaac de Rivaz. The commander of the troops stationed in the department was Étienne Félix d'Henin de Cuvillers.[4]