Sorginak (root form: sorgin, absolutive case (singular): sorgina) are the assistants of the goddess Mari in Basque mythology. It is also the Basque name for witches or pagan priestesses (though they could also be male), being difficult to discern between the mythological and real ones.

Sometimes sorginak are confused with lamiak (similar to nymphs). Along with them, and specially with Jentilak, sorginak are said often to have built the local megaliths.

Sorginak, like other European witches, used to participate in the sabbat, called akelarre locally. These mysteries happened on Friday nights, when Mari and Sugaar are said to meet in the locally sacred cave to engender storms.

The etymology of the name is disputed. The common suffix -gin (actor, from egin: to do) is the only agreement.

Sorginak are often said to recite the following spell to travel to and back from the akelarre: Under the clouds and over the brambles, or variants of it. In many legends a failed witch (normally a man) says the spell inverted (Under the brambles and over the clouds) and arrives to the akelarre quite bruised.