The Great Western Railway (GWR) 2884 Class is a class of 2-8-0 steam locomotive. They were Collett's development of Churchward's earlier 2800 Class and are sometimes regarded as belonging to that class.

The 2884s were designed for heavy freight work and differed from the original Class 2800 engines (Nos. 2800-2883) in a number of respects, the most obvious being that a more modern Collett side window cab was provided and that they were built with outside steam pipes. The locomotives were so popular with the ex-Great Western crews that the British Railways Western Region operating authorities wanted more of the class built after nationalisation in 1948; however, this request was turned down in favour of BR Standard Class 9Fs.

83 were built, 9 were saved, and four of these engines have operated in preservation.