September 13 is the 256th day of the year (257th in leap years). There are 109 days remaining.
- 1775 — Klaas Annink died.
- 1918 — Sarah Makin died.
- 1956 — Robert Foley is born.
- 1963 — Reinaldo Rivera is born.
- 1963 — Rex Heuermann is born.
- 1968 — Anthony Kirkland is born.
- 1971 — Gary Dion Davis is born.
- 2003 — Lenko Latkov died.
- 2004 — Charlie Brandt died.
- 2004 — Shojiro Nishimoto is apprehended.
- 2016 — Shawn Michael Grate is apprehended.