Poosapati / Pusapati was the ruling clan of the Northern Andhra region, Vizianagaram.

The name is derived from its founder Raja Vijayaram Raj who established a sovereign kingdom by claiming independence from the Kingdom of Jeypore in 1711. It formed alliances with the French and British East India Company to conquer the neighbouring principalities of Bobbili, Kurupam, Paralakhemundi and the Kingdom of Jeypore. However, they fell out with the British and as a result were attacked and defeated in the Battle of Padmanabham. They were annexed as a tributary estate like other principalities and remained so until their accession to the Indian Union in 1949.