Lahti (Swedish: Lahtis) is a city and municipality in Finland.
Lahti is the capital of the Päijänne Tavastia region. It is situated on a bay at the southern end of lake Vesijärvi about 100 kilometres (60 mi) north-east of the capital Helsinki. In English, the Finnish word Lahti literally means bay and Vesijärvi means water lake. In 1964, Lahti hosted the Winter Olympic Games.
The symbol of the city depicts a train wheel surrounded by sparkling flames.