Mohamed Ghassan Maumoon (Dhivehi: މުޚައްމަދު ޣައްސާން މައުމޫން; born 20 June 1980) is a Maldivian politician and incumbent Minister of Defence of the Maldives.

[2][3] Ghassan studied Molecular Biology & Biomedical Sciences Research at King's College London.

His first ministerial position was as State Minister for Human Resources, Youth and Sports during the presidency of Mohamed Waheed Hassan Manik.

[4][5] Later during the presidency of his uncle, Abdulla Yameen Abdul Gayoom, he was the State Minister for Youth and Sports.

[9] Ghassan is the son and youngest child of the former president, Maumoon Abdul Gayoom and former first lady, Nasreena Ibrahim.