芒格阿尔多伊（Mangaldoi），是印度阿萨姆邦Darrang县的一个城镇。总人口23854（2001年）。

该地2001年总人口23854人，其中男性12476人，女性11378人；0—6岁人口2587人，其中男1323人，女1264人；识字率80.60%，其中男性为84.90%，女性为75.88%。

Mangaldai (Assamese:মঙ্গলদৈ, /ˈmæŋɡəlˌdɔɪ/; also spelt Mangaldoi) is a small town in the Indian state of Assam. It was named after Mangaldahi, who was the daughter of the Rajah of Darrang and was married to Pratap Singha, a ruler of the Ahom kingdom. Mangaldoi serves as the administrative headquarters of Darrang district, and is an important trading centre for agricultural products. The town is divided into 9 wards.