白令陆桥（英语：Beringia，俄语：Берингия）位于白令海，伸延至极限时长达1600公里。白令陆桥连接现今的美国阿拉斯加西岸和俄罗斯西伯利亚东岸、更新世（前180万－前1万年）时连接的地方数量和变化无法估计。

因为来自太平洋的西南风吹至阿拉斯加时已逐渐失去水分（雨影现象），以致白令陆桥降雪量低，所以它未结成冰川。

Beringia is defined today as the land and maritime area bounded on the west by the Lena River in Russia; on the east by the Mackenzie River in Canada; on the north by 72 degrees north latitude in the Chukchi Sea; and on the south by the tip of the Kamchatka Peninsula. It includes the Chukchi Sea, the Bering Sea, the Bering Strait, the Chukchi and Kamchatka Peninsulas in Russia as well as Alaska in the United States. The area includes land lying on the North American Plate and Siberian land east of the Chersky Range. Historically, it formed a land bridge that was up to 1,000 kilometres (620 mi) wide at its greatest extent and which covered an area as large as British Columbia and Alberta together (1,600,000 square kilometres (620,000 sq mi)). This land bridge connected Asia and North America at various times during the Quaternary glaciation.