| Name | Railroad, # | Builder, s/n | Build date | Whyte type | Notes |
|---|---|---|---|---|---|
| Kaiser | GWR | Kitson | 1862 | 2-4-0T | Wd 1872. |
| Kashmir | LMS 5588 | 4-6-0 | |||
| Keele Hall | GWR 5903 | 4-6-0 | |||
| Keith | LMS 5655 | 4-6-0 | |||
| Kelham Hall | GWR 5904 | 4-6-0 | |||
| Kempenfelt | LMS 5662 | 4-6-0 | |||
| Kenilworth | LNER 9422 | 4-4-0 | |||
| Kenilworth Castle | GWR 4097 | 4-6-0 | |||
| Kennet | GWR 3015 | GWR | 4/1892 | 2-2-2 | Rb 8/1894 as 4-2-2; involved in an accident in Slough in 1900; wd 6/1908. |
| Kenya | LMS 5613 | 4-6-0 | |||
| Keppel | LMS 5673 | 4-6-0 | |||
| Kertch | GWR | GWR | 1855 | 4-2-2 | Wd 1872. |
| Kestrel | LNER 4485 | 4-6-2 | |||
| Kestrel | LNWR 90 | NBL | 4-6-0 | Became LMS 5660; wd 8/1936. | |
| Ketley Hall | GWR 4935 | 4-6-0 | |||
| Kettledrummle | LNER 9425 | 4-4-0 | |||
| Keyes | LMS 5658 | 4-6-0 | |||
| Khan | GWR | Kitson | 1862 | 2-4-0T | Wd 1872. |
| Kidwelly | BP&GV 4 | Avonside | 1903 | 0-6-0T | Became Great Western 2194; retired in 1953; scrapped. More information: Wikipedia. |
| Kidwelly Castle | GWR 4098 | 4-6-0 | |||
| Kilgerran Castle | GWR 4099 | 4-6-0 | |||
| Kilkee | WCR | 1909 | 4-6-0T | ||
| Kilverstone Hall | LNER 2842 | 4-6-0 | |||
| Kimbolton Castle | LNER 2833 | 4-6-0 | |||
| Kincardineshire | LNER 307 | 4-4-0 | |||
| King | SDR | Avonside | 1871 | 2-4-0T | Became GWR 2171 in 1876; converted to narrow gauge and rn 2 in 1878;s 1907 to Bute Works Supply Co. |
| King Arthur | LNWR 1949 | 6/1901 | 4-4-0 | Rb 1/1918; became LMS 5152. | |
| King Arthur | SR 453 | 4-6-0 | |||
| King Charles I | GWR 6010 | 4-6-0 | |||
| King Charles II | GWR 6009 | 4-6-0 | |||
| King Edward I | GWR 6024 | 4-6-0 | |||
| King Edward II | GWR 6023 | 4-6-0 | |||
| King Edward III | GWR 6022 | 4-6-0 | |||
| King Edward IV | GWR 6017 | 4-6-0 | |||
| King Edward V | GWR 6016 | 4-6-0 | |||
| King Edward VI | GWR 6012 | 4-6-0 | |||
| King Edward VII | GWR 6001 | 4-6-0 | |||
| King Edward VII | LNER 5259 | 4-4-2 | |||
| King Edward VII | LNWR 1942 | 5/1901 | 4-4-0 | Rb 9/1922; became LMS 5185. | |
| King Edward VIII | GWR 6029 | 4-6-0 | |||
| King George | D&SER 20 | 4-4-2T | |||
| King George I | GWR 6006 | 4-6-0 | |||
| King George II | GWR 6005 | 4-6-0 | |||
| King George III | GWR 6004 | 4-6-0 | |||
| King George IV | GWR 6003 | 4-6-0 | |||
| King George V | GWR 6000 | 4-6-0 | |||
| King George VI | GWR 6028 | 4-6-0 | |||
| King George VI | LMS 6244 | 4-6-2 | |||
| King Henry III | GWR 6025 | 4-6-0 | |||
| King Henry IV | GWR 6020 | 4-6-0 | |||
| King Henry V | GWR 6019 | 4-6-0 | |||
| King Henry VI | GWR 6018 | 4-6-0 | |||
| King Henry VII | GWR 6014 | 4-6-0 | |||
| King Henry VIII | GWR 6013 | 4-6-0 | |||
| King James I | GWR 6011 | 4-6-0 | |||
| King James II | GWR 6008 | 4-6-0 | |||
| King John | GWR 6026 | 4-6-0 | |||
| King Leodegrance | BR 73118 | Doncaster | 12/1956 | 4-6-0 | Officially named 3/1960 at Eastleigh; wd 7/1967; scr 9/1968. |
| King Leodegrance | SR 739 | 4-6-0 | |||
| King of Italy | LNWR 185 | Crewe | 4-6-0 | Became LMS 5644; wd 3/1936. | |
| King of Serbia | LNWR 160 | Crewe | 4-6-0 | Became LMS 5643; wd 10/1934. | |
| King of the Belgians | LNWR 122 | Crewe | 4-6-0 | Became LMS 5642; wd 3/1936. | |
| King Pellinore | BR 73115 | Doncaster | 11/1956 | 4-6-0 | Officially named 1/1960 at Eastleigh; wd 3/1967; scr 11/1967. |
| King Pellinore | SR 738 | 4-6-0 | |||
| King Richard I | GWR 6027 | 4-6-0 | |||
| King Richard II | GWR 6021 | 4-6-0 | |||
| King Richard III | GWR 6015 | 4-6-0 | |||
| King Uther | BR 73111 | Doncaster | 10/1956 | 4-6-0 | Wd 9/1965; scr 2/1966. |
| King Uther | SR 737 | 4-6-0 | |||
| King William III | GWR 6007 | 4-6-0 | |||
| King William IV | GWR 6002 | 4-6-0 | |||
| King's Canterbury | SR 933 | 4-4-0 | |||
| King's Own Yorkshire Light Infantry | LNER 4843 | 2-6-2 | |||
| King's Wimbledon | SR 931 | 4-4-0 | |||
| Kingfisher | GWR 3448 | 4-4-0 | |||
| Kingfisher | LNER 4483 | 4-6-2 | |||
| Kingsland Grange | GWR 6876 | 4-6-0 | |||
| Kingston | L&BR 5 | SR&Co | 11/1839 | 2-2-2 | Rn 39; became Joint Committee #50; transferred to LBSCR as #44; wd 8/1851. |
| Kingstone Grange | GWR 6820 | 4-6-0 | |||
| Kingsway Hall | GWR 5933 | 4-6-0 | |||
| Kingswear Castle | GWR 5015 | 4-6-0 | |||
| Kinlet Hall | GWR 4936 | 4-6-0 | |||
| Kinross-shire | LNER 310 | 4-4-0 | |||
| Kirby Hall | GWR 5993 | 4-6-0 | |||
| Kneller Hall | GWR 5934 | 4-6-0 | |||
| Knight Commander | GWR 4020 | 4-6-0 | |||
| Knight of Liège | GWR 4017 | 4-6-0 | |||
| Knight of St. John | GWR 4015 | 4-6-0 | |||
| Knight of St. Patrick | GWR 4013 | 4-6-0 | |||
| Knight of the Bath | GWR 4014 | 4-6-0 | |||
| Knight of the Grand Cross | GWR 4018 | 4-6-0 | |||
| Knight of the Thistle | GWR 4012 | 4-6-0 | |||
| Knight of the Thistle | LNER 2564 | 4-6-2 | |||
| Knight Templar | GWR 4019 | 4-6-0 | |||
| Knolton Hall | GWR 5958 | 4-6-0 | |||
| Knowsley | LNWR 1114 | Crewe 4499 | 9/1905 | 4-4-0 | Became LMS 5217; wd 1/1933. |
| Knowsley Hall | GWR 5905 | 4-6-0 | |||
| Kolhapur | LMS 5593 | 4-6-0 |