| Ōnuma Station | |
| Native Name: | 大沼駅 |
| Native Name Lang: | ja |
| Style: | JR Hokkaido |
| Address: | 4-5 Ōnuma-Cho, Nanae Town, Kameda District |
| Borough: | Hokkaido Prefecture |
| Country: | Japan |
| Coordinates: | 41.972°N 140.6691°W |
| Line: | Hakodate Main Line |
| Distance: | from |
| Status: | Unmanned station |
| Platforms: | 2 side platforms |
| Tracks: | 2 + 1 through-track |
| Structure: | At grade |
| Code: | H 68 |
| Website: | https://www.jrhokkaido.co.jp/ |
| Passengers: | 90.4 daily |
| Pass Year: | 2014-2018 (Average) |
| Map Type: | Japan Hokkaido#Japan |
is a railway station on the Hakodate Main Line located in Nanae, Hokkaidō, Japan. It is operated by JR Hokkaido and has the station number "H68".[1]
The station is served by the Hakodate Main Line and is located 27.0 km from the start of the line at .
The station has two platforms serving three tracks on the ground level.
| 1 | ■Hakodate Main Line | For Hakodate | |
| 2 | ■< | --Hakodate Main Line--> | (siding) |
|---|---|---|---|
| 3 | ■Hakodate Main Line | For Ōnuma-Kōen and Mori (via Komagatame) For Shikabe and Mori (via Oshima-Sawara) |
The station was opened on 28 June 1903 by the private Hokkaido Railway as an intermediate station during the phase of expansion when the track was extended north from Hongō (today) to . After the Hokkaido Railway was nationalized on 1 July 1907, Japanese Government Railways (JGR) took over control of the station. On 12 October 1909 the station became part of the Hakodate Main Line. On 1 April 1987, with the privatization of Japanese National Railways (JNR), the successor of JGR, control of the station passed to JR Hokkaido.