Ken Marshall, born Kenneth Marshall on June 27, 1950, in New York City, is a retired American actor known for his work in film, television, and theater. He graduated from Saint Joseph High School in Michigan in 1968 and built a notable career starting with stage roles, including productions like "The Tempest" in 1979.

Marshall gained international attention for his title role in the 1982 television miniseries "Marco Polo." He is also widely recognized for starring as Prince Colwyn in the 1983 fantasy adventure film "Krull." On television, some of his notable roles include Lt. Commander Michael Eddington in "Star Trek: Deep Space Nine" (1994–1997), a character for which he received an OFTA Television Award nomination for best male actor. He appeared in other TV shows such as "Quantum Leap," "Empty Nest," "Baywatch," and "Hunter." His film credits include "Tilt" (1979), "The Skin" (1981), and "Feds" (1988), among others.