The following lists events that happened during 1948 in the Grand Duchy of Luxembourg.
Incumbents
Events
January – March
9 January – The Luxembourg Airlines Company is founded. 29 January – The first conference of Benelux foreign ministers is held, in Luxembourg City. 2 February – Luxembourg Airlines Company makes its first flight, from Luxembourg – Findel to Paris – Le Bourget. 17 March – Luxembourg signs the Treaty of Brussels.
April – June
3 April – The Obermosel-Zeitung and l'Unio'n cease publication and are merged into the new Lëtzebuerger Journal. 5 April – The Lëtzebuerger Journal begins publication. 6 June – Partial elections are held to the Chamber of Deputies, resulting in gains for the Luxembourg Socialist Workers' Party at the expense of the Christian Social People's Party
July – September
14 July – In the aftermath of the previous month's election, the government is reshuffled, with Nicolas Margue and Lambert Schaus replaced by Pierre Frieden and Aloyse Hentgen. 26 July – At the 1948 Summer Olympics, the Luxembourg national football team records its largest-ever victory, beating Afghanistan 6–0. 29 July – The 1948 Summer Olympics proper begin, with 45 competitors from Luxembourg. None wins a medal. 4 August – Émile Raus, Lambert Schaus, and André Origer are appointed to the Council of State, replacing Michel Rasquin and Pierre Frieden.