Mick Lynch (born 1962) is a British trade unionist.
Born in London, to parents from Ireland, Lynch grew up in Paddington. He left school at the age of 16, and qualified as an electrician. He later moved to work in construction, and joined a trade union, but found himself illegally blacklisted as a result. In 1993, unable to find work in construction, he began working for Eurostar, and became active in the National Union of Rail, Maritime and Transport Workers (RMT). Twenty years later, he received a large settlement for the illegal blacklisting.
Lynch served two terms as assistant general secretary of the RMT, and two terms on its executive. In 2020, after general secretary Mick Cash took time off due to ill health, he was appointed as acting general secretary, but stood down after a few months, accusing members of its executive of bullying and harassment. Despite this, he stood in and won an election for the permanent position, taking it up in May 2021.