| Ølstykke | |
| Symbol: | S |
| Symbol Location: | Copenhagen |
| Type: | S-train station |
| Style: | Copenhagen S-train |
| Address: | Stationsvej 2, 3650 Ølstykke |
| Borough: | Egedal Municipality |
| Country: | Denmark |
| Bus Routes: | 312, 600S, 91N |
| Platform: | 2 side platforms |
| Tracks: | 2 |
| Rebuilt: | 28 May 1989 (S-train) |
| Electrified: | 1989 (S-train) |
| Code: | Øl |
| Owned: | DSB |
| Zone: | 85 |
| Map Type: | Denmark Capital Region#Denmark |
Ølstykke station is an S-train railway station serving the district of Ølstykke Stationsby in the northwestern part of the satellite town of Ølstykke-Stenløse northwest of Copenhagen, Denmark. The station is located on the Frederikssund radial of the S-train network of Greater Copenhagen.
The station is located where the railway to Frederikssund crosses the main road between Roskilde and Hillerød. This puts it quite a distance away from the old village of Ølstykke, but a new station town grew up around the station after the railway opened in 1879. Since 2002, the area around the old village has been served by a station of its own, Gammel Toftegård. Gammel Toftegård station later changed name to Egedal station.
Vinge station 3.3 km (2 miles) northwest of Ølstykke station opened 14 December 2020. It is served by the C line.