Wabag is the capital of Enga Province, Papua New Guinea. It is the least populous provincial capital in the country. It is on the Lai River; the Highlands Highway passes through the town, between Mount Hagen and Porgera. Europeans first visited the site in 1938-39 A radio camp and airstrip were established in 1938-39 but restrictions on transportation and the surrounding land's infertility long inhibited Wabag's development.