Marne (French pronunciation: [maʁn]) is a department in north-eastern France named after the river Marne (Matrona in Roman times) which flows through the department. The prefecture (capital) of Marne is Châlons-en-Champagne (formerly known as Châlons-sur-Marne). The subprefectures are Épernay, Reims, Sainte-Menehould, and Vitry-le-François.

The Champagne vineyards producing the world-famous sparkling wine are located within Marne.

Marne is one of the original 83 departments created during the French Revolution on March 4, 1790. It was created from the province of Champagne.

Marne has a long association with the French Army. The training ground of the Camp Militaire de Mailly straddles the border with the département of Aube in the south while that of the Camp de Mourmelon occupies a large area north of Châlons-en-Champagne. The smaller Camp de Moronvilliers lies to the east of Reims and the Camp Militaire de Suippes lies to the east of that. These are all on the chalk of the Champagne plateau, a feature comparable in geology but not size, with the British military training ground on Salisbury Plain.

Laouni Mouhid, commonly known by his alias La Fouine (English: The Weasel) or Fouiskin (born December 25, 1981 in Trappes, Yvelines), is a French rapper of Moroccan origins from the city of Trappes, Yvelines in the Paris western suburbs. He is an established figure in French rap. La Fouine signed with Sony Records in 2003 and released his debut album, Bourré au son, in 2005. La Fouine released his second album, Aller-Retour, on March 12, 2007. The American beatmaker Focus produced four songs on the album. His most recent album, Mes Repères, was released on February 23, 2009 and is two times gold record in France. His new album, a double CD intitled "La Fouine Vs Laouni," released on February 14 for Valentine's Day, was inspired by the two sides of himself, through his career and experience of his daily life. The first one, La Fouine, a character he created to "entertain people, La Fouine is very cunning, materialistic, bad boy and so vulgar ... it's not really me" said the artist. The second one Laouni (his real name) talks about things he lived in his youth, so his rap is sincere and moving. The week of album's release, more than 25 621 copies were sold in France, a feat for a hip hop artist. He has also his own label "Banlieue Sale Music" and his own clothing line called "Street Swagg".