Tavastia (formerly Tavastia South) is an electoral district represented in the Finnish Eduskunta (parliament). It covers the administrative regions of Kanta-Häme and Päijät-Häme, with a combined population of about 364,000 (as of 2002). Tavastia currently elects 14 members of the Eduskunta. The constituency is largely urban, centred on the cities of Hämeenlinna and Lahti. The largest party in the 2011 election was the Social Democratic Party of Finland.