Vesijako (also Vesijakaa) is a lake in Finland.

It is situated in Padasjoki in the region of Päijänne Tavastia.

One is eastwards to the lake Päijänne, which is a part of Kymijoki basin and drains to the Gulf of Finland.

The other outflow is into a chain of lakes that is a part of the Kokemäenjoki basin and consists of the lakes Kuohijärvi, Kukkia, Iso-Roine, Hauhonselkä and Ilmoilanselkä and ends into lake Mallasvesi, from which the waters flow through Vanajavesi and Pyhäjärvi towards Kokemäenjoki in the west, and ultimately to the Gulf of Bothnia.

This Southern Finland location article is a stub.