Background:. Dietary Diversity (DD) has long been recognized as a key element of high quality diets. Even with optimum breastfeeding, children will become stunted if they do not receive sufficient dietary diversity after six months of age. The transition period from exclusive breast feeding to two years is a critical window of opportunity for optimal growth and development of a child. Therefore, during this period adequate foods from 4 or more of the seven food groups should be provided along with continued breastfeeding. Objective: To assess the magnitude of dietary diversity and associated factors among children 6-23 months age in health centers of Addis Ababa, Ethiopia, 2017. Methods: Institution based cross sectional study design conducted in public health centers of Addis Ababa from January to February 2017. The study included a sample of 422 children from 6-23 months who visited health centers for different health services. . Data were collected by using structured and pretested questionnaire. Data transferred from Epi info database to SPSS database using stat transfer for analysis. Binary Logistic regression analysis was fitted and odds ratios with 95% Confidence intervals and pvalues were computed to identify factors associated with dietary diversity feeding practice. p- Value<0.05 considered as statistically significant. Result: A total of 410 children aged 6–23 months were used for final analysis. Children with adequate dietary diversity score were 30.7%. Children born from secondary and above educated mother, mother religion being protestant and catholic, and child’s age 1723 months, post natal care (PNC), knowledge of mother on infant and young child feeding (IYCF) were significantly associated with minimum dietary diversity. Conclusion and Recommendation: Even though the study showed better progress as compared to the national prevalence of Adequate dietary diversity feeding practices, dietary diversity in the study area were low and not achieving WHO infant and young child feeding recommendations. Government and stakeholders should be strengthening the available strategies and creating new Intervention measures to improve maternal health services especially PNC, maternal literacy, and maternal knowledge on IYCF and attitude of culture and tradition for better practices of child feedings