Mangaldoi; also spelt Mangaldai, Assamese pronunciation: [mɔŋɔldoɪ], is a town in the state of Assam, India.

[3] Basanta Das of Indian National Congress is the present MLA of Mangaldoi.

Dilip Saikia of Bharatiya Janata Party is the present MP of Mangaldoi.

The population is largely heterogeneous consisting Assamese, Bengali, Marwadi, Bihari, Punjabi communities.

A major institution in Mangaldai is Assam Skill University (ASU), which is situated in Bidya Nagar.