Undi Assembly constituency is a constituency in West Godavari district of Andhra Pradesh that elects representatives to the Andhra Pradesh Legislative Assembly in India. It is one of the seven assembly segments of Narasapuram Lok Sabha constituency.
Raghu Rama Krishna Raju is the current MLA of the constituency, having won the 2024 Andhra Pradesh Legislative Assembly election from Telugu Desam Party. As of 2019, there are a total of 219,488 electors in the constituency. The constituency was established in 1951, as per the Delimitation Orders (1951).
The five mandals that form the assembly constituency are: