Honiara. Honiara is the capital and largest city of Solomon Islands, situated on the northwestern coast of Guadalcanal. As of 2019, it had a population of 129,569 people. The city is served by Honiara International Airport and the seaport of Point Cruz, and lies along the Kukum Highway. In 1983, a capital territory ??? comprising the 22 square-kilometre metropolitan area of Honiara ??? was proclaimed, with a self-governing status akin to a province, although the city also retained its older role as capital of Guadalcanal Province.