Finnish national road 12 (; ) is a highway in Finland between Rauma and Kouvola via Huittinen, Tampere and Lahti. The road is long. It is known as Teiskontie to the east of the Tampere urban area.
The route of the road is: Rauma â Eura â Köyliö â Kokemäki â Huittinen â Sastamala â Nokia â Tampere â Kangasala â Pälkäne â Hämeenlinna â Hämeenkoski â Hollola â Lahti â Nastola â Orimattila â Nastola (again) â Iitti â Kouvola.