Previous studies on parking facilities in tertiary institutions have overlooked the environmental impact of parking capacity utilization. This research aims to bridge this gap by examining the organized parking lots at Federal Polytechnic Ilaro, with a focus on proposing optimal and sustainable parking solutions. The study's objectives are to identify organized parking spaces on campus; determine parking volume, index, and turnover in these spaces; and propose optimal parking space utilization strategies. Using a week-long observational study and secondary data from the institution's Master Plan and Strategic Plan, the findings reveal that the parking index is less than 1 for all surveyed facilities, indicating underutilization of parking spaces. The study recommends the need to promote walking by constructing walkways linking parking facilities to activity points and encourage sustainable parking practices to reduce environmental impact