| Castlewellan | |
| Status: | Disused |
| Borough: | Castlewellan, County Down |
| Country: | Northern Ireland |
| Original: | Great Northern Railway (Ireland) |
| Pregroup: | Great Northern Railway (Ireland) |
| Postgroup: | Great Northern Railway (Ireland) |
| Years: | 24 March 1906 |
| Events: | Station opens |
| Years1: | 2 May 1955 |
| Events1: | Station closes |
Castlewellan railway station was on the Great Northern Railway (Ireland). It was located in the village of Castlewellan.
The station was opened by the Great Northern Railway (Ireland) on 24 March 1906 with the opening of its line to Banbridge, and the opening of the Belfast and County Down Railway line from Newcastle.
The BCDR's line from Belfast (Queen's Quay) to Newcastle via Downpatrick closed on 16 January 1950, but the GNR continued to operate services from Banbridge to Newcastle via Castlewellan until final closure of the line on 2 May 1955.
From the mid-2000s the site has been used as an industrial estate consisting of three blocks of light industrial units. Tenants include self storage units, a gym, kids gymnastics centre, tile and bathroom shop, motor factors and a tyre fitting depot.