Solomon Islands Business Directory: SLB is the ISO 3 alphabet country code of Solomon Islands. Currency of Solomon Islands is $, which has a short code of SBD. Capital of Solomon Islands is Honiara. Solomon Islands has the population of 623281 and approximate area is 28896.00 square kilometers (or approx. 17955.9744 square miles). Population density of Solomon Islands is approx. 21/Km2 (or approx. 13.0494/mile2)