那瑟斯（Nerthus），在北欧神话中，她是一个独立的神祇，在日耳曼地区，她被视为等同弗丽嘉的女神，属于丰饶女神。

在北欧神话中，那瑟斯是华纳神族的女神，尼约德（Njord）的姊姊。

在作风开放的华纳神族里，那瑟斯和尼约德曾在一次宴会中有了关系，弗雷（Freyr）和弗蕾亚（Freya）据说就是她和弟弟尼约德的孩子。

当华纳神族和阿萨神族的战争结束，双方交换人质，尼约德、弗雷、弗蕾亚都以人质的身份到阿斯嘉特去了，之后彼此都没再见过面。

In Germanic paganism, Nerthus is a goddess associated with fertility. Nerthus is attested by Tacitus, the first century AD Roman historian, in his ethnographic work Germania.

In Germania, Tacitus records that the remote Suebi tribes were united by their veneration of the goddess at his time of writing and maintained a sacred grove on an (unspecified) island and that a holy cart rests there draped with cloth, which only a priest may touch. The priests feel her presence by the cart, and, with deep reverence, attend her cart, which is drawn by heifers. Everywhere the goddess then deigns to visit, she is met with celebration, hospitality, and peace. All iron objects are locked away, and no one will leave for war. When the goddess has had her fill she is returned to her temple by the priests. Tacitus adds that the goddess, the cart, and the cloth are then washed by slaves in a secluded lake. The slaves are then drowned.