Willoughby Key suburbs Prime territory includes - Willoughby, Northbridge & Cammeray, plus additional surrounding agile territory. Number of dwellings in this territory 14,548 Median household income (weekly) $2,304 Population in Willoughby 119,528 Median age 37 years old Willoughby Dominated by Australian born residence, with high median weekly household income. Most common occupations include Professionals, Managers and Administrative Workers. Send Andrew an enquiry Recruitment Manager Yellow Brick Road Call Speak with a Recruitment Manager today! Schedule an appointment, call us at: 0411 722 294 Call Email