| Quoted Person | Number of Quotes |
| Kahlil Gibran | 10 |
| Karl Barth | 1 |
| Karl Marx | 3 |
| Karl Popper | 1 |
| Karol Newlin | 1 |
| Karyl Roosevelt | 1 |
| Katharine Graham | 1 |
| Katherine Hepburn | 2 |
| Kay Francis | 1 |
| Keith Richards | 1 |
| Ken Thompson | 2 |
| Kenneth Millar | 1 |
| Kermit The Frog | 1 |
| Kevin Smith | 1 |
| Kierkegaard | 1 |
| Kim Hubbard | 1 |
| Kin Hubbard | 2 |
| Konrad von Gesner | 1 |
| Kurt Russell | 1 |
| Kurt Vonnegut | 16 |