May 27 is the 147th day (148th in leap years) of the year, with 218 days remaining.

• 1850 — Thomas Neill Cream is born.
• 1952 — Robert Lee Yates is born.
• 1958 — Wayne Williams is born.
• 1960 — Patricia Jones is murdered by Sharon Kinne.
• 1974 — Brenda Joy Baker is allegedly murdered by Ted Bundy (suspected victim).
• 1984 — Michelle Denise Simms is murdered by Bobby Joe Long.
• 1991 — Konerak Sinthasomphone is murdered by Jeffrey Dahmer.
• 1994 — Charles Rodman Campbell died.
• 1998 — Gary Evans is apprehended.
• 2003 — Derrick Todd Lee is apprehended.
• 2003 — Ensio Koivunen died.
• 2010 — Thomas Whisenhant died.
• 2015 — James Fairweather is apprehended.
• 2018 — Stewart Weldon is apprehended.
• 2024 — Carloes Andrés Rivera is apprehended.