July 23 is the 204th day (205th in leap years) of the year, with 161 days remaining.
- 1941 — Lemuel Smith is born.
- 1942 — Myra Hindley is born.
- 1944 — Gustave Sapharas is born.
- 1959 — Leroy Keith died.
- 1989 — Tsutomu Miyazaki is apprehended.
- 1993 — Roberta Elder died.
- 1999 — Fa Ziying is apprehended.
- 2007 — Viktor Sayenko and Igor Suprunyuk ("Dnepropetrovsk Maniacs") are apprehended.
- 2011 — Firuz Aituganov is apprehended.
- 2013 — Derek Percy died.