Tai Po is an area in the New Territories of Hong Kong. It refers to the vicinity of the traditional market towns in the area presently known as Tai Po Old Market or Tai Po Kau Hui (大埔舊墟) on the north of Lam Tsuen River and the Tai Po Hui on Fu Shin Street on the south of the Lam Tsuen River, near the old Tai Po Market railway station of the Kowloon-Canton Railway. Both market towns became part of the Tai Po New Town in the late 1970s and early 1980s. In present-day usage, "Tai Po" may refer to the area around the original market towns, the Tai Po New Town, or the entire Tai Po District.

The New Territories is one of the three main regions of Hong Kong, alongside Hong Kong Island and the Kowloon Peninsula. It makes up 86.2% of Hong Kong's territory, and contains around half of the population of Hong Kong. Historically, it is the region described in the Convention for the Extension of Hong Kong Territory. According to that treaty, the territories comprise the mainland area north of Boundary Street on the Kowloon Peninsula and south of the Sham Chun River, as well as over 200 outlying islands, including Lantau Island, Lamma Island, Cheung Chau, and Peng Chau in the territory of Hong Kong.