POST Luxembourg, formerly known as Entreprise des Postes et Télécommunications (French pronunciation: [ɑ̃tʁəpʁiz de pɔst e telekɔmynikasjɔ̃], "Postal and Telecommunications Company"), is a mail and telecommunications company based in Luxembourg.

The company is a government-owned corporation, which originated from Luxembourg's state-owned PTT agency founded in 1842, and was subsequently corporatised in 1992.

It also sells financial services and holds a monopoly on issuing postage stamps in the Grand Duchy.

[2] P&T owns shares in sixteen other companies, including controlling stakes in eBRC data centres (100%), Editus.lu (100%), Eltrona, HotCity, Infomail (45%), Intech, Michel Greco (60%), Netcore (100%), POST Telecom (100%), POST PSF Consulting (100%), Victor Buck Services (Majority), Visual Online (51%).

[3] On September 30, 2013, P&TLuxembourg and LuxGSM merged into a single brand, POST Luxembourg.