Introduction: Appropriate nutrient intake and/or complementary feeding in quantity, bioavailability and timely in infancy period are essential for optimal growth and development. Initiation of safe and nutritionally adequate complementary foods at 6 month is crucial to achieve optimal growth, development and health. Exclusive breastfeeding) for the first six months of life is critical for the wellbeing of the infant. This study aim was to assess the prevalence of timely initiation of complementary feeding and associated factors among infants 6 to 12 months age in Addis Ababa.