Dimi Mint Abba (Arabic: ديمي منت آبا‎‎; 25 December 1958 – 4 June 2011) was one of Mauritania's most famous musicians.

She was born Loula Bint Siddaty Ould Abba in 1958 into a low-caste ("iggawin") family specializing in the griot tradition. She was the daughter of .
Her first international release was on the World Circuit record label, following a recommendation from Ali Farka Touré. On this album, she was accompanied by her husband Khalifa Ould Eide and her two daughters.

Later she composed famous and popular Mauritanian songs like "Hailala" and "Koumba bay bay".

She died in June, 2011, in Casablanca, Morocco following a stage accident in Aioun ten days earlier when she was singing for Sahrawi public.
She died of a cerebral hemorrhage. Her death was described as "a national loss" by Mohamed Ould Abdel Aziz, the President of Mauritania.