Kagan, Norman,
--The Mathenauts, July, 1964. *

Kapp, Colin,
--Patterns of Chaos (Part 1), #158, January-February, 1972.
--Patterns of Chaos (Part 2), #159, March-April, 1972.
--Patterns of Chaos (Conclusion), #160, May-June, 1972.
--The Wizard of Anharitte (Part I), #163, November-December, 1972.
--The Wizard of Anharitte (Part II), #164, January-February, 1973.
--The Wizard of Anharitte (Conclusion), #165, March-April, 1973.
--Mephisto and the Ion Explorer, #174, September-October, 1974. (novelette)

Keith, S. Roger,
--Death and Taxes, #174, September-October, 1974. (humor)

Kelley, Leo,
--The Human Element, June, 1957.

Keyes, Daniel,
--The Quality of Mercy, November, 1960. (novelette)

Killough, Lee,
--Caravan, #160, May-June, 1972.

Knight, Damon, (1922-2002)
--Anachron, January, 1954. **
--The Earth Quarter, January, 1955. * (novella)
--The Second-Class Citizen, November, 1963. *

Koontz, Dean R.,
--In the Shield, #134, January, 1969. (novelette)
--Where the Beast Runs, #139, July, 1969. (novelette)
--Shambolain, #151, November-December, 1970.

Kurland, Michael,
--see Garrett, Randall, and Michael Kurland