The station is served by commuter and regional trains operated by Vy Gjøvikbanen. Along the line to the east runs the Ring 3 road, and across that there is a tram and bus stop. A bit further north of Grefsen Station there is a connection to the Oslo Metro, at Storo.
There is also a tram stop with the same name across Ring 3. It is the terminating stop of line 17 and 18. Trams change routes here, without requiring a balloon loop. Here, a tram coming in from Sinsenkrysset (on line 17) will terminate and then change to route 18 and continue straight to Storo. The tram stop is also right next to Grefsen Depot, the main depot for the Oslo Tramway network and houses the headquarters of Sporveien Trikken.