| Name | Book/story/stage title | Notes
|
| Katie | The Making of Mac's | Adopted daughter of Mr MacFarland
|
| Kay, Lady | Oh, Kay! | A bootlegger's sister
|
| Kay, Mr | The Head of Kay's | An awful house master at Eckleton College
|
| Keating, Constable | Misunderstood | A policeman
|
| Keating, Mrs | Cocktail Time | Landlady in Chelsea
|
| Keeble, Joe | Leave it to Psmith | Husband of Lady Constance, an wealthy man
|
| Keeble, Lady Constance | | Sister of Lord Emsworth
|
| Keggs | | The butlers [sic], including Augustus
|
| Kegworthy, Mr | Fixing it for Freddie | Father of 'Tootles', holidaying in Marvis Bay
|
| Keith, Elsa | | A young woman
|
| Keith, Mr | Love Me, Love My Dog | Elsa Keith's father
|
| Kelly, Captain | Big Money | Friend of J. B. Hoke
|
| Kemp, Lancelot 'Ginger' | The Adventures of Sally | A sturdy young man
|
| Kendal | Bradshaw's Little Story | Boy at St. Austin's College
|
| Kennedy | The Head of Kay's | Boy at Eckleton
|
| Kent, Mary | The Awakening of Rollo Podmarsh | Wants a man who's done something heroic
|
| Kimbuck, Lady | A Man of Means | Lord Evenwood's sister
|
| Kit | Not George Washington | Wife of Malim
|
| Kitchener, Thomas | Something to Worry About | A gardener and slow man
|
| Knight, Mr | An Afternoon Dip | A master at Locksley College
|
| Knight, Winfield | In Alcala | An actor
|
| Knubble of Knopp, Lord | | Godfather of Eustace Mulliner
|
