Trachelipus rathkii, also known as Rathke's woodlouse, is a species of woodlouse in the genus Trachelipus (family Trachelipodidae). It can be found across Europe, except in the Mediterranean Basin. It has also been introduced to North America, where it can be found across most of the northern half of the United States and southern Canada. They have been recorded as far west as Alberta.

Rathke's woodlice grow to 1.5 centimetres (0.59 in) long.

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