Yagub Javad oglu Mammadov (Azerbaijani: Yaqub Cavad oglu M?mm?dov / J???? ????? ???? ????????; born 3 March 1941, ?liismayilli, Gadabay Rayon, Azerbaijan), also spelled as Yagub Mammadov (Azerbaijani: Yaqub M?mm?dov / J???? ????????), was the Acting President of Azerbaijan from 6 March to 14 May and from 18 to 19 May 1992.
Mammadov is currently an opposition politician, professor and scientist.