The population density of the town was around seven hundred and fifty one people per square mile. This means that around seven hundred and fifty one people live in every square mile. This is the same as around two hundred and ninety people living in every square kilometer. There are a number of different races living in the census designated place of Hilo. Out of the total population, around seventeen percent of the people are White, around thirty eight percent of the total population is Asian, 0.34 percent of the total population is Native American, around thirteen percent of the population is Pacific Islander, and 0.45 percent of the total population is African American. The rest of the population is divided into other races, which included two or more races. Out of any race, around nine percent of the total population was Latino or Hispanic.

In the census designated place of Hilo, the median income of a household was around thirty nine thousand one hundred and thirty nine dollars. In case of a family, the median income was forty eight thousand one hundred and fifty dollars. As compared to females, the median income for males was higher, that is for males it was thirty six thousand and forty nine dollars, and for females it was twenty seven thousand six hundred and twenty six dollars. Out of the total population around seventeen percent of the people live below the poverty line, and around eleven percent of the families live below the poverty line.