The Vaccinium vitis-idaea – often called lingonberry and also called cowberry (UK), foxberry, mountain cranberry, red whortleberry, lowbush cranberry, mountain bilberry, partridgeberry (in Newfoundland and Cape Breton), and redberry (in Labrador) – is a small evergreen shrub in the flowering plant family Ericaceae that bears edible fruit.

It is seldom cultivated, but the fruits are commonly collected in the wild. The native habitat is the circumboreal forests of northern Eurasia and North America, extending from temperate into subarctic climates.