Onsøy Golfklubb sits in Manstad in the Østfold region of southeastern Norway, near the town of Fredrikstad and the Swedish border. The club operates an 18-hole course that serves the local golfing community in this coastal area along the Oslofjord. The region's relatively mild climate by Norwegian standards allows for a longer playing season than courses farther north or inland. The course occupies terrain typical of the Østfold landscape, with a mix of forested sections and open farmland. The routing takes advantage of natural elevation changes and incorporates mature trees that frame fairways and define playing corridors. Water features appear on several holes, reflecting the area's proximity to both the fjord and inland waterways. The layout requires course management rather than pure length, with strategic bunkering and green complexes that reward accurate approach play. Onsøy Golfklubb functions as a member-supported facility that also welcomes visiting golfers during the season. The club maintains practice areas including a driving range and short game facilities. Like many Norwegian clubs, it emphasizes accessibility and family participation in the sport, with programs designed to introduce new players to golf. The clubhouse provides dining and social space that serves both daily play and club events throughout the warmer months when Norwegian golf is most active.