Getting to know Honolulu will be easy once you’ve organized a rental car. But before you hit the tarmac in a new place, it’s always a smart idea to know a bit of basic info about the area.It sits 4,847 miles to the west of Washington, the buzzing national capital.Facts, figures and data intrigue you? Like to find out roughly how many people reside in this part of Honolulu County before you set off on your day trip? At the last count, the population was 371,700.