Lieto (Finnish pronunciation: [ˈlie̯to]; Swedish: Lundo) is a city and municipality of Finland.
It is located in the province of Western Finland and is part of the Southwest Finland region. The municipality has a population of 20,620 (31 August 2024) and covers an area of 302.56 square kilometres (116.82 sq mi) of which 1.66 km2 (0.64 sq mi) is water. The population density is 68.61 inhabitants per square kilometre (177.7/sq mi).
Neighbour municipalities are Aura, Kaarina, Marttila, Paimio, Pöytyä and Turku.
The city is unilingually Finnish.
Lieto has a medieval stone church, St. Peter's church, that originates from around 1500 near the city center.
The city is also home to the largest local scout troop in Finland, called LEK or Liedon Eränkävijät.
Lieto was changed to a city in July 2022.
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