The arctic hare (Lepus arcticus), or polar rabbit, is a species of hare which is adapted largely to polar and mountainous habitats. The arctic hare survives with a thick coat of fur and usually digs holes under the ground or snow to keep warm and sleep. Arctic hares look like rabbits but have shorter ears and can stand up taller, and can live/maintain themselves in cold places unlike rabbits. They can travel together with many other hares, sometimes huddling with dozens or more, but are usually found alone, taking in some cases more than one partner. The arctic hare can run up to 40 miles (64 km) per hour. Its predators include Arctic wolf, Arctic fox, and Ermine.

The arctic hare is distributed over the tundra regions of Greenland and the northernmost parts of Canada. Towards the south of its range, the arctic hare changes its coat colour, moulting and growing new fur, from brown or grey in the summer to white in the winter, like some other arctic animals including ermine and ptarmigan, enabling it to remain camouflaged as the background changes. However, the arctic hares in the far north of Canada, where summer is very short, remain white all year round.