Abstract: Background and Objective: The sub-Saharan Africa foulest on enhancing the income of small holder within the context of trade liberalization. Small holders production and marketing of vegetable is a key for growth and development of small holder farmers, apart from their economic important they are environment friendly to fight against drought. Oromia has diverse agro-ecology and many areas are suitable for growing subtropical or tropical onion substantial areas receive sufficient rainfall and many lacks. Rivers and streams could also be used to support onion production despite this potential the total land area under onion production is very small and minimum. The study was initiated with the objectives of survey of onion marketing and identifying of challenges and opportunities of onion marketing in Toke kuttaye district, West Shewa, Oromia, Ethiopia. Materials and Methods: Sample of respondents was selected purposively to its population size. Data come from a total of 95 samples. Data were analyzed by descriptive statics. Results: Weak extension support, lack of credit facilities, poorly constricted in fractures and limited seed supply system largely hinders production, productivity and marketing of onion in the study area. On the top of this, limited accessibility of chemicals and fertilizers within the district are the key constraints. Irrigable land, fertile land and committed farmers work and grow were found to have some of the opportunities. Conclusion: Total quality onion produced was positively affecting the level of onion sale. The possible recommendation of forwarded strengthening market information and extension system, intervention to increase production and productivity by using improved agricultural inputs, promoting family planning are the recommended policy implications.