Greåker is a borough in the city of Sarpsborg, Norway, located 7 km west of the city centre. Before 1992 Greåker was a part of Tune municipality. It is situated at the river Glomma between Sarpsborg and Fredrikstad.The borough of Greåker is the home of the Premier League Floorball team "Greåker Bulldogs". The team's home arena is the Tindlundhallen arena. Greåker has been a site for diverse industry for decades, most notably in the area of paper production.