The Sokołda is a 45 km long tributary of the Supraśl in the northeast Poland in the voivodeship Podlaskie. It is very popular with canoeists and anglers.
Run
The Sokołda rises on the Sokółka Hills not far from Sokółka south of the Biebrza National Park and flows south through the Knyszyn Heath to the Supraśl, where they at Białystok flows out.