| Composer | Title | Year | Pages & duration |
| Kay, Donald H. (1933-) | Sonata for organ | 1967 | 34p. 15m. |
| Keane, Robert J. (1948-) | Prelude & fugue after Frederick Delius | 1971 | 10p.6m. |
| Keenan, Adrian J. (1952-) | Till death do us part for organ duet & tape | 1977 | 2p. 14m. |
| Kelly, Cicely (c. 1910-) | Fantasia in d minor | 1951 | 8p. |
| Chorale prelude no. 1 on "Angel's song" (Gibbons) dedicated to Jack Anderson | 1972 | 6p. | |
| Chorale prelude no. 2 | 1973 | ||
| Sonata in C for organ ii Pastorale (for Douglas Lawrence) |
1974 | ||
| Toccata for organ | c. 1974 | 14p. 10m. | |
| Kelly, Frederick S. (1881-1916) | Christmas prelude on "Good King Wenceslas" | 1910 | |
| Kerry, Gordon, (1961-) | Siderius nuncius | 1985 | 11p. 9m. |
| Festival cantata for trebles, SATB chorus & organ (elaborate organ accompaniment) | 1990 | 15m. | |
| King, Henry John Sr. (1820-1888) | Unknown work(s) | ||
| King, Henry John Jr. (1855-1934) | Unknown work(s) | ||
| Knight, Ruby (1905-1986) | Nocturne | 6p. | |
| Knox, William R. (1861-1933) | Angelic whispers | ||
| The Collegians march in D | 1899 | ||
| Koehne, Graeme J. (1956-) | Gothic toccata (Toccata Aurora) | 1983 | 11p. 8m. |
| To His servant, Bach, God grants a final glimpse - the Morning Star | 1994 | 7p. | |
| Krelle, Michael (1947-) | Unknown work(s) |