Nasir Uddin Ahmed Mithu (নাসির উদ্দিন আহমেদ মিঠু) is a Bangladeshi businessman, industrialist and politician. He is a Member of Parliament from the Moulvibazar-1 constituency.

Nasir Uddin Ahmed Mithu is a former vice president of Moulvibazar District unit of the Bangladesh Nationalist Party. He is also a member of the convening committee of Moulvibazar District BNP.

In the 13th Jatiya Sangsad election, 2026, he was elected for the first time as a Member of Parliament from the Moulvibazar-1 constituency as a candidate of the Bangladesh Nationalist Party.