Harker Heights is a fairly young city, having been incorporated in 1960. The city has no major industry, which is why most of its residents work in Killeen, Fort Hood, or other areas of Bell County. Harker Heights has four recreation areas as well as the Killeen Municipal Golf Course and Stillhouse Hollow Lake. On average, the warmest month is July, the coolest is January and the maximum average precipitation occurs in May. The population as of 2000 was 17,308. Education Local Links Interactive Map