9 pages, The study examined the effect of marketing intermediaries on onion prices in Benue state, Nigeria. A multistage sampling method was employed to select 150 onion sellers in the study area. Primary data were collected using a structured questionnaire administered to respondents. Data collected were analysed using descriptive statistics, marketing efficiency and Gini coefficient. The study revealed that the majority (66.7%) of the respondents were female, 46.7% were married with an average age of 38 and an average income of ₦96684.00. The result also showed e marketing efficiency of 5.19 indicating that the product was efficient in the study area and Gini coefficient of 0.29 indicating that onion marketing is perfectly competitive. Transportation and storage facilities constituted the greatest challenge faced by onion sellers in the study area. Based on the findings of the study, it was recommended that the sellers should form cooperatives to promote bulk purchase which will, in turn, reduce transportation charges as well as enable them to achieve the benefits from economies of scale.