Lahti sub-region
Lahti sub-region is a subdivision of Päijät-Häme and one of the sub-regions of Finland since 2009. The Lahti region has a population of, making it the fifth largest region in Finland after Helsinki, Tampere, Turku and Oulu.
Municipalities
| Coat of arms | Municipality | Population | Land area | Density | Finnish speakers | Swedish speakers | Other speakers |
| Asikkala | % | % | % | ||||
| Hartola | % | % | % | ||||
| Heinola | % | % | % | ||||
| Hollola | % | % | % | ||||
| Iitti | % | % | % | ||||
| Kärkölä | % | % | % | ||||
| Lahti | % | % | % | ||||
| Orimattila | % | % | % | ||||
| Padasjoki | % | % | % | ||||
| Sysmä | % | % | % | ||||
| Total | % | % | % | - |