September 18 is the 261st day of the year (262nd in leap years). There are 104 days remaining.

• 1887 — William Burkitt is born.
• 1959 — Harvey Glatman died.
• 1960 — Tina Thompson (victim) is born.
• 1961 — Steve Wells is born.
• 1963 — Steven Wood (victim) is born.
• 1973 — Arohn Kee is born.
• 1983 — "Green River Killer"'s victim, Gail Mathews is found.
• 2002 — Yoshiteru Hamada died.
• 2012 — Dale Cregan is apprehended.