Heather N. Nicol is a political geographer whose work explores the structure and operation of the Canada–US border, with special emphasis on the impacts of security and sovereignty. Among her publications are Beyond Walls: Reinventing the Canada–US Borderlands and Holding the Line: Border in a Global World. She is also interested in the circumpolar North as a geopolitical space, and the relationship between the interests of nation-states and indigenous peoples in the North.