Ad-Doueir (Arabic: الدوير, ad-Duwayr), or Dweir, is a municipality of 7,500 inhabitants in Southern Lebanon near Nabatieh, and north of the Litani River.

Although Ad-Doueir is considered a big village, it is the home of many well-known Lebanese such as former Labour minister Ali Qanso, and the late physics scientist Rammal Rammal.

In 1875 Victor Guérin found it to be a large village with 800 Metuali inhabitants.

[1] During the 2006 Lebanon War, Ad-Doueir was among the first targets of the Israel Defense Forces, with a family of 12 killed on July 13.

[2][3][4] The village has since benefited from investment by the Italian government to build a new olive oil mill.