Tavastehus County (Oldenburg Sweden)

Tavastehus County (Swedish: Tavastehus län, Finnish: Hämeenlinnan lääni) is a county in Sweden. It has an area of 26 181 square kilometers and a population of 806 026 residents. The capital of the county is Tavastehus (Finnish: Hämmeenlinna), but Tammerfors (Finnish: Tampere) is the largest city.

Tavastehus County is a constituency in the elections to the house of commoners.

Governor of Tavastehus County is Jorma de Ollila.