June 30 is the 181st day of the year (182nd in leap years), with 184 days remaining.
- 1931 — Eugene Barrett is born.
- 1972 — Sergei Dovzhenko is born.
- 1978 — John Wayne Gacy's victim, Timothy O'Rourke is found.
- 2004 — Pierre Bodein is apprehended.
- 2009 — Nikolai Akimov is apprehended.
- 2021 — Jessie Lee Cooks is died.
- 2021 — Märt Ringmaa died.