Mathias Dzon (born 1947) is a Congolese politician who served in the government of Congo-Brazzaville as Minister of Finance from 1997 to 2002. Subsequently he was the National Director of the Bank of Central African States (BEAC) from 2003 to 2008 and a candidate in the July 2009 presidential election, although he decided to boycott the election shortly before it was held. He is the President of the Patriotic Union for National Renewal (UPRN).
Dzon was born in Ingouelé, near Gamboma. After studying in France, he began working at the BEAC in September 1977, rising to senior management positions. He became Director-General of the International Bank of Congo (BIDC) in April 1985.
During the single-party rule of the Congolese Labour Party (PCT), which ended in 1991, Dzon was not a member the ruling party. He helped to found the UPRN in 1991 and became its President. He participated in the 1991 Sovereign National Conference, and during the Conference he placed fourth in the vote for the position of transitional Prime Minister. He was subsequently elected to the National Assembly as the UPRN candidate in Gamboma constituency. Under Dzon's leadership, the UPRN did not initially support the government or the opposition, but in September 1994 it joined the Democratic and Patriotic Forces (FDP) opposition coalition, thereby allying itself with the PCT, led by Denis Sassou Nguesso.
Dzon resigned from his post as Director-General of the BIDC in 1995 and instead took a post at the BEAC's agency in Pointe-Noire. He went into exile in 1996, going to Gabon and then France. Following Sassou Nguesso's return to power in the June–October 1997 civil war, Dzon returned to Congo-Brazzaville from France and was appointed by Sassou Nguesso as Minister of Finance and the Budget on 2 November 1997. He was retained in the government named on 12 January 1999 as Minister of the Economy, Finance, and the Budget.