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Tartu (Estonian pronunciation: [ˈtɑrtˑu], South Estonian: Tarto) is the second largest city of Estonia, after Estonia's political and financial capital Tallinn. It is situated 186 kilometres (116 miles) southeast of Tallinn and 245 kilometres (152 miles) northeast of Riga, the capital of Latvia. The distance to Estonia's summer holiday capital Pärnu in the west is 176 kilometres (109 miles) and the fastest route there by car is through Viljandi and Kilingi-Nõmme. Tartu lies on the Emajõgi ("Mother river"), which connects the two largest lakes of Estonia, Lake Võrtsjärv and Lake Peipus. The city is served by Tartu Airport.

Tartu is often considered the intellectual centre of the country, especially since it is home to the nation's oldest and most renowned university, the University of Tartu; Tartu itself is also the oldest city of Estonia and other Baltic countries. Tartu houses the Supreme Court of Estonia, the Ministry of Education and Research, the Estonian National Museum, and the oldest Estonian-language theater, Vanemuine. It is also the birthplace of the Estonian Song Festivals.

Tartu will be the European Capital of Culture in 2024.