This article is a list of events in the year 2003 in Mauritania.

Incumbents President: Maaouya Ould Sid'Ahmed Taya Prime Minister: Cheikh El Avia Ould Mohamed Khouna Sghair Ould M'Bareck

Events June 8-10: A failed military coup attempted to overthrow the President Maaouya Ould Sid'Ahmed Taya. September 19: The Maritime delimitation treaty between Mauritania and Cape Verde was signed. November 7: President Maaouya Ould Sid'Ahmed Taya is reelected for another term; he won the election with 67% of the popular vote.

Sports ASC Nasr de Sebkha won the Ligue 1 Mauritania football championship.

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