Queen Amarindra (1737-1826), () was the Queen Consort of King Rama I ("the Great") of Siam, the founder of the Chakri Dynasty. Her birth name was Nak (Thai นาค). She was a daughter of a Mon richman from Bang Chang, in Samut Songkhram Province.

Born in 1737 as an minor Ayutthayan noble, Amarindra married the future King Buddha Yodfa Chulaloke, when he was still an ordinary soldier called Thong Duang around 1760. She bore him a total of ten children during her lifetime; this included the future King, Prince Isarasundhorn (King Rama II). She was made Queen of Siam in 1782 when husband became King of Siam. She was elevated to the title Somdet Phra Amarindra Borommarachini (). During her lifetime she oversaw building of two temples, one dedicated to her mother. She died in 1826 at the age of 89 in the Grand Palace in Bangkok.