If you’re about to jump behind the wheel of your rental car but don’t know all that much about Wahiawa, don’t sweat it. Here are some basic facts to help you get started.It sits 4,847 miles to the west of Washington, the buzzing national capital.It’s always good to know how many people live in the place you’re heading to. In this area of Honolulu County, the population is around 17,800.