Lahti is a city and municipality in Finland. It is the capital of the region of Päijänne Tavastia and its growing region is one of the main economic hubs of Finland. Lahti is situated on a bay at the southern end of lake Vesijärvi. It is also situated at the intersection of Highway 4 and Highway 12, which are the most significant main roads of Lahti.
Lahti has a population of over 116,549 people.