Public Directory Add to Address Book. County of Hawaii, Department of Research and Development County of Hawaii, Department of Research and Development Address 25 Aupuni Street, Room 1301 Hilo HI 96720 United Statespostal Phone: (808) 961- 8366home Work Email: chresdev@hawaiicounty.govINTERNET Website: http://rd.hawaiicounty.gov Related by Category U.S. Small Business Administration answerdesk@sba.govINTERNET