Peter Kevin Killough[1] (born 1960) is an American lawyer who has served as a justice of the Supreme Court of Maryland since 2024.

He served as a member of the United States Army Reserves while he attended the University of Virginia, where he earned a Juris Doctor degree in 1989.

[2][5] In this capacity, Killough challenged Allstate's decision to stop offering new homeowners' policies in coastal parts of the state,[6] advocated for the Maryland Court of Appeals to abandon its practice of deferring to insurance companies' interpretation of policy terms in legal cases,[7] and supported legislation to ban "forced bundling" by insurers.

[8] On November 30, 2017, Governor Larry Hogan appointed Killough as an associate judge of the Prince George's County Circuit Court from the seventh district.

[11][12] In May 2024, he applied to fill the Maryland Supreme Court seat vacancy left by Justice Michele D. Hotten, who had reached the mandatory retirement age in April.