The Radcliffe Line was the boundary demarcated between the Indian and Pakistani portions of the Punjab Province and Bengal Presidency of British India. It was named after its architect, Cyril Radcliffe, who, as the joint chairman of the two boundary commissions for the two provinces, received the responsibility to equitably divide 175,000 square miles (450,000 km2) of territory with 88 million people.

The demarcation line was published on 17 August 1947 upon the Partition of British India. Today, its western side is part of the India–Pakistan border while its eastern side serves as the Bangladesh–India border.