The area administered to by Eniwa extends north to the Shimamatsu river and stops at the border to Naganuma township in Sorachi Subprefecture. Eniwa borders Chitose city along its south border, with the cities being separated by as little as 750 m in some places. To the west of Eniwa is the Shikotsu-Tōya National Park. Eight mountains in the park are considered a part of Eniwa, including and Mount Soranuma. In the area is the hydroelectric Izarigawa Dam that dams the Izari river.