3 services stop at Otaru Station. Counting services on the same tracks once, it is a transfer station for 2 lines.
| Line | Previous | Next |
|---|---|---|
| JR Hakodate Main Line (Sapporo - Asahikawa) | Hoshimi | Minami-Otaru |
| JR Hakodate Main Line (Hakodate - Otaru) | Kutchan | (terminus) |
| JR Hakodate Main Line (Otaru - Oshamambe) | (terminus) | Minami-Otaru |
One of the nearest stations to Otaru Canal.