The Nigerian commercial poultry sector is dependent on commercial feeds. Evaluation of the operational and pricing efficiencies of poultry feed marketing is essential for improving efficiencies in the feed industry and lowering the price of poultry products. A multistage sampling technique was used to select the firms studied. Tools used to analyze data collected included index of pricing and operational efficiencies; and regression analysis. The firms studied handled about N251,870,000 of feed per annum, had an annual Inventory Carrying Cost (ICC) of N4,587,762 and an average ICC of N114,694 per firm. The Marketing Costs (MC) for all the firms was N16,813,860 per annum while the average MC was N420,347. Major contributors to ICC were storage; handling and security costs while storage, transportation and capital costs were major contributors to MC. Efforts to minimize costs should therefore be focused at reducing transportation costs and optimal utilization of storage space. The Average Marketing Costs (AMC) declined with increase in quantity marketed (QM) while unit profit increased with QM. Firms therefore need to increase QM. Marketing Margin (MM) and MC were significantly different from each other. Also, QM was a significant explanatory variable of MM, implying that there was no pricing efficiency in the market. Relative efficiency increased with QM, suggesting that firms should strive to increase the quantity of feed marketed. The major contribution of this study is that it provides information on the components of marketing costs and size economies in the poultry feed industry in Ondo State, Nigeria.