Kalvola is a former municipality of Finland. Its seat was in Iittala. It was consolidated with Hämeenlinna on 2009-01-01.
It is located in the province of Southern Finland and is part of the Tavastia Proper region. The municipality had a population of 3,449 (2003) and covered an area of 338.81 km² of which 38.75 km² is water. The population density was 10.2 inhabitants per km². Kalvola is best known for its Iittala glass factory.
The municipality was unilingually Finnish.
A central element of the landscape in Kalvola is lake Vanajavesi near which many of the oldest settlements in the area are concentrated.
NHLer Hannu Toivonen was born here.
Coordinates: 61°05′30″N 24°08′05″E / 61.09167°N 24.13472°E