Steam locomotives operated in the United Kingdom with names beginning with J.
| Name | Railroad | Builder, s/n | Build date | Whyte type | Notes |
|---|---|---|---|---|---|
| J. A. Bright | LNWR 250 | Crewe | 8/1914 | 4-6-0 | Became LMS 5910; rb 1928; wd 4/1937. |
| J. A. F. Aspinall | LNWR 2395 | Crewe | 9/1916 | 4-6-0 | Became LMS 5929; wd 3/1935. |
| J. P. Bickersteth | LNWR 2271 | 10/1910 | 4-4-0 | Became LMS 5331; rn 25331; wd 11/1936. | |
| J. Bruce Ismay | LNWR 209 | Crewe | 9/1914 | 4-6-0 | Became LMS 5914; wd 12/1934. |
| Jackdaw | GWR 3447 | 4-4-0 | |||
| Jamaica | LMS 5612 | 4-6-0 | |||
| James Bishop | LNWR 1345 | Crewe | 8/1916 | 4-6-0 | Became LMS 5924; wd 9/1934. |
| James Fitzjames | LNER 6401 | 4-4-0 | |||
| Janus | GWR | 0-6-0 | |||
| Jason | GWR | 0-6-0 | |||
| Jason | LNWR 2064 | Crewe 4469 | 3/1905 | 4-4-0 | Became LMS 5273; wd 8/1931. |
| Javelin | GWR | 2-2-2 | |||
| Jay | SDR | Avonside | 1875 | 0-4-0ST | Became GWR 2179 in 1876; standard gauged in 1892; rn 1333; s to Powesland & Mason. |
| Jean | Krauss-Maffei | 1926 | 0-4-0 | Ex-RH&DR #4 The Bug; returned to RH&DR in the 1970s. | |
| Jeanie Deans | LNER 9899 | 4-4-0 | |||
| Jellicoe | LMS 5667 | 4-6-0 | |||
| Jersey | SR 81 | 4-4-0 | |||
| Jervis | LMS 5663 | 4-6-0 | |||
| Jingling Geordie | LNER 9421 | 4-4-0 | |||
| Joffre | LNER 9682 | 0-6-0 | |||
| John Bateson | LNWR 1725 | 11/1910 | 4-4-0 | Became LMS 5324; rn 25324; wd 11/1938. | |
| John Bright | LNWR 1745 | Crewe | 4/1892 | 2-4-0 | Rn Glowworm in 1914; became LMS 5034; wd 11/1930. |
| John Bunyan | BR 70003 | Crewe | 3/1951 | 4-6-2 | Withdrawn March 1967; scr December 1967. |
| John Gray | GWR | 2-4-0 | |||
| John Hick | LNWR 752 | 2/1913 | 4-4-0 | Became LMS 5381; wd 11/1935. | |
| John Keats | LNWR 1081 | Crewe | 4-6-0 | Became LMS 5612; wd 1/1936. | |
| John Mayall | LNWR 89 | 3/1913 | 4-4-0 | Became LMS 5383; wd 5/1936. | |
| John Milton | BR 70005 | Crewe | 4/1951 | 4-6-2 | Wd 7/1967; scr 1/1968. |
| John O'Groat | LNWR 1599 | Crewe | 2/1920 | 4-6-0 | Named 8/1922; became LMS 5968; wd 1/1935. |
| John of Gaunt | BR 70012 | Crewe | 6/1951 | 4-6-2 | Wd 12/1967; scr 4/1968. |
| John of Gaunt | LNWR 1921 | 2/1900 | 4-4-0 | Ex-T. H. Ismay in 4/1913; became LMS 5134. | |
| John Ramsbottom | LNWR 1211 | Crewe | 11/1888 | 2-4-0 | Became LMS 5012; wd 12/1930. |
| John Rennie | LNWR 2124 | 2/1913 | 4-4-0 | Became LMS 5382; rn 25382; wd 6/1937. | |
| John Ruskin | LNWR 2198 | Crewe | 4-6-0 | Became LMS 5620; wd 3/1936. | |
| Jonathan Oldbuck | LNER 6383 | 4-4-0 | |||
| Joshua Radcliffe | LNWR 1193 | Crewe | 8/1896 | 2-4-0 | Wd 3/1913. |
| Joyous Gard | BR 73088 | Derby | 9/1955 | 4-6-0 | Wd 10/1966; scr 6/1967. |
| Joyous Gard | SR 741 | 4-6-0 | |||
| Jubilee | LNWR 1901 | 6/1897 | 4-4-0 | Rb 4/1919; became LMS 5156. | |
| Judy | ECC | Bagnall 2572 | 1937 | 0-4-0T | Was originally to be named Chough but was misinterpreted by the builder as Cough and so was delivered without a name; named in 1960; wd 1969; preserved in 1978; now restored and operating on the Bodmin & Wenford Railway. More information: Wikipedia. |
| Juno | GWR | 0-6-0ST | |||
| Juno | SDR | SSG | 1864 | 0-6-0ST | Became GWR 2153 in 1876. |
| Jupiter | GWR | 2-2-2 | |||
| Jupiter | GWR 3313 | 4-4-0 | |||
| Jupiter | L&BR 9 | SR&Co | 12/1840 | 2-2-2 | Rn 40; became Joint Committee #54; transferred to LBSCR as #46; wd 11/1854. |
| Jupiter | LNWR 1975 | 7/1903 | 4-4-0 | Rb 1/1921; became LMS 5167. | |
| Jupiter | SDR | Ince Forge | 1876 | 2-4-0ST | Ordered by SDR but not completed until after GWR purchased SDR; became GWR 1298 upon completion at Swindon; wd 1926. |
| Jutland | LMS 5684 | 4-6-0 | |||
| Jutland | LNER 5504 | 4-4-0 | |||
| Juvenal | GWR | 4-4-0ST |