Santhanuthalapadu is a Scheduled Caste reserved constituency in Prakasam district of Andhra Pradesh that elects representatives to the Andhra Pradesh Legislative Assembly in India.

[1] It is one of the seven assembly segments of Bapatla Lok Sabha constituency.

[2] B. N. Vijay Kumar 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 211,326 electors in the constituency.

[3][needs update] The constituency was established in 1962, as per the Delimitation Orders (1962).