Djursten is a Swedish lighthouse located at Västerbyn on the west side of the island of Gräsö in the northern Roslagens archipelago.

The first lighthouse built to guide sailors from Öregrund was a stone tower topped by a charcoal fire in an iron pot.

In 1809 the ship Bellona ran hard aground outside Djursten.

The current lighthouse was at first equipped with an oil lamp and parabolic mirrors that focused the light.

[2] Today Djursten holds a small modern light visible for 11 nautical miles mounted outside the original lighthouse lantern.