Grefsen station (Norwegian: Grefsen stasjon) is a railway station at Storo in Oslo, Norway on the Gjøvik Line. From the station there is also a short railway, the Alnabru–Grefsen Line, to Alna on the Hoved Line. The station is located 6.82 km from Oslo Central Station and is located between Tøyen and Nydalen at 109.2 metes above sea level. It was opened on 20 December 1900, two years before the railway to Gjøvik was finished. The station serves Nordre Åsen sports field.