Seaports play a vital role in global trade and commerce, serving as gateways for the movement of goods and facilitating economic growth. With the globalization of the world economy bringing changes into the port industry, Nigeria government is not left behind in evolving and embracing strategies for improved ports performance. Hence, the initiation and implementation of concession of the nation’s seaport located in Apapa, Tincan and Onne. As a result, this study has examined the users’ perception of the concession and the performance of Onne seaports in River State Nigeria. The study is anchored on the Productivity Model and the Concept of Seaport Concession. Also, both primary and secondary data were used for this study. The use of questionnaire was deployed to elicit data on the port performances at the pre and post Concession vis-à-vis users’ perception of the cargo throughput, vessel turnaround time, berth occupancy ratio, vessels call and labour productivity ratio. Also, data was collected on the factors such as automation of port services, port accessibility, multiplicity of government agencies, modern equipment, and inter – modal transport network. The collected data was analysed descriptively and inferentially. Findings revealed that improvement in ports operational parameters including the Average turnaround time (ATRT), Berth Occupancy Rates (BOR) and Cargo Throughput (CART), the post concession indicators are port users (consumers) satisfaction of port products (PUSPP), the quality of services provided at the real time (QSPRT), and the accessibility of port users to port environment (APUPE) after the concession. The study however, concluded that ports concession has brought significant improvement to operations and activities as well as the usher in a major relief to various categories of users; hence, the need to sustain and consolidate the gains recorded in seaport operations and performance at the post-concession period at Onne Seaport. Hence, the study recommended the consolidation of ports concession in line with the trends in the maritime sector and to further evolve mechanism for reducing cost of transit, enhancing quality services, encouraging cheap and users’ friendly ports among others.