Blieux (French pronunciation: [blijø]; Occitan: Blieus) is a rural commune in the Alpes-de-Haute-Provence department in the Provence-Alpes-Côte d'Azur region in Southeastern France.

The commune of Blieux first appeared on maps in 1100.

Much later, during the French Revolution, records show that the residents of Blieux had created a political club (patriotic society), which was very common at the time. (See Jacobin Club).

According to Ernest Nègre, the first recorded name for the commune, Bleus, was derived from the Occitan word bleusse, meaning 'dry'. This was likely a reference to the local soil. By contrast, Charles Rostaing argues that the name derives from the pre-Indo-European root word, *BL, meaning 'mountain in the form of a spur'.

La Melle, the name of a nearby hamlet, comes from the Celtic word, mello, meaning an elevated location.

Historically, Blieux was a pastoral community, with a yearly alpine grazing cycle known as transhumance. As with much of Provence, tourism the primary source of economic activity today.

The village is located at an altitude of 950m, in the valley formed by a tributary of the river Asse, known as the 'Asse de Blieux'.

• le Bas-Chadoul
• la Melle
• la Tuilière
• Thon
• La Castelle

• Mont Chiran (1905 m)
• le Grand Mourre (1898 m)
• Crête de Montmuye (Montmuye ridge) (Highest point: 1621 m)
• Le Mourre de Chanier ( 1930 m)

Historical population

Year	Pop.	±% p.a.
1968	59	—
1975	54	−1.26%
1982	59	+1.27%
1990	57	−0.43%
1999	59	+0.38%
2009	56	−0.52%
2014	59	+1.05%
2020	55	−1.16%
Source: INSEE

With the exception of those that have been totally abandoned, Blieux is one of the communities in the Alpes-de-Haute-Provence department that has experienced the greatest population decline from the mid-19th to the mid-20th centuries.

Inhabitants are known as Blieuxois (masculine) and Blieuxoises (feminine) in French.

• Communes of the Alpes-de-Haute-Provence department