Tsia or TSIA may refer to:

• Chokha or tsia, a traditional woolen coat of the peoples of the Caucasus
• Xie (surname), a Chinese surname sometimes romanised as Tsia
• Tsia language, a Papuan language spoken in Morabe Province, Papua New Guinea
• 4105 Tsia, a minor planet named for the Zia people
• The Scottish International Airshow, an annual air show founded in 2014
• Tsia Creek, a tributary of the Liard River of North America
• Tsia River, in Kolkheti National Park in the country of Georgia

• Zia people (New Mexico), a tribe of the indigenous Keres Pueblo peoples
• Tsai, a surname
• Stia, Tuscany, Italy