Emmanuel John Nchimbi (born 24 December 1971) is a Tanzanian diplomat and politician currently serving as the Vice-President of the United Republic of Tanzania. He previously served as the Minister of Home Affairs between 2012 and 2013 and as Member of Parliament for Songea Town constituency from 2010 to 2015.
Nchimbi went to Uru and Sangu Secondary Schools after which he proceeded to an advanced education at Forest Hill Secondary School in Mbeya. After graduating from Mzumbe University where he studied diploma in public administration, he pursued a master's degree in banking and finance, and eventually a doctorate.
Nchimbi became the chair of the CCM's youth wing after joining the National Executive Committee in 1997. Prior to earning a position in the Songea Urban Assembly, he was the Bunda District Commissioner from 2003 to 2005. He then served in the Cabinet in a number of capacities, including those of Home Affairs, Labor, and Information. In the year 2015 to 2023, he represented Tanzania as ambassador to Egypt and then Brazil before he returned to party politics He was named Secretary-General of the CCM in January 2024.
In 2025, he unveiled plans to strengthen the mining sector to serve East and Central Africa. He also pledged to review and introduce policies and laws to protect Tanzanian miners.