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Hilo (/ËhiËloÊ/) is the largest city, census-designated place (CDP), and settlement in Hawaii County, Hawaii, which encompasses the Island of HawaiÊ»i. The population was 40,759 at the 2000 census. The population increased by 6.1% to 43,263 at the 2010 census.
Hilo, HI Area Codes are. Hilo, HI is currently using one area code which is area code 808. In addition to Hilo, HI area code information read more about area code 808 details and Hawaii area codes. Hilo, HI is located in Hawaii County and observes the Hawaii-Aleutian Time Zone and does not use daylight saving time. View our Times by Area Code tool.