Dr. Hussein Ali Mwinyi (born 1966) is the 8th President of the semi-autonomous region of Zanzibar and the Chairman of the Revolutionary Council. The son of Tanzania's second President, Ali Hassan Mwinyi, he is a medical doctor by training who transitioned into a formidable political force. He was sworn in for his second five-year term on November 1, 2025, after securing 74.8% of the vote in the October 2025 elections, defeating candidates from a heavily suppressed opposition. During his tenure, Dr. Mwinyi has championed the \"Blue Economy\" agenda, establishing Zanzibar's first-ever Ministry of Blue Economy to optimize the archipelago's marine resources, seaweed farming, and tourism. He has maintained a tough stance against systemic corruption, establishing the Zanzibar Anti-corruption and Economic Crimes Authority (ZAECA), which has prosecuted hundreds of public servants. While his first term began with a Government of National Unity incorporating opposition figures, the political climate hardened significantly during the 2025 election cycle, aligning with the broader national crackdown orchestrated by the ruling CCM party.