Sangbay or Sangbaykha Gewog is a gewog of Haa District, Bhutan. It is one of the western gewogs of the Haa district sharing borders with the Samtse District, India's Sikkim state and China's Chumbi Valley. The latter border has been contested by China, which claims the Doklam region as its territory. In recent years, China has begun to build villages in its claimed area.