In many small-scale tourism and water transport services, booking operations are still handled manually. Manual reservation methods often lead to overbooking, poor record maintenance, and lack of transparency in customer management. This paper presents the design and development of a Web-Based Boat Booking Management System developed using the Flask web framework and a relational database management system. The proposed system allows users to register, log in, check boat availability, book boats online, and view booking history. An administrative module is implemented to manage boat details, update schedules, and monitor reservations. The system ensures data accuracy, prevents duplicate bookings, and improves overall operational efficiency. The implementation results show that the system simplifies booking procedures and reduces human errors compared to traditional manual systems.