- September 29 – The trial to determine whether the City of Alexandria will be allowed to annex 8.3 square miles of Fairfax County begins before the three-judge panel of Barnard F. Jennings, Edward P. Simpson and James C. Godwin.
- September 29 – 36-year-old Henry S. Robinson chases his former girlfriend, 40-year-old Ethel J. Marsh, into her neighbor's townhouse at 7309 Jon Paul Lane in Alexandria and shoots her to death in an upstairs bedroom. Robinson flees the scene and is found suffering from a self-inflicted gunshot wound at his house at 6320 Hibbling Avenue in Springfield. 
- Bredemeier, Kenneth. "Hearing Set Today on Alexandria Bid to Get County Land." The Washington Post, Times Herald (1959-1973): 1. Sep 29 1969. ProQuest. Web. 16 June 2017.
- Bredemeier, Kenneth. "Fairfax Mother of 4 Killed; Accused Slayer Shoots Self." The Washington Post, Times Herald (1959-1973): 1. Sep 30 1969. ProQuest. Web. 2 June 2014.
|Fairfax County by Year: 1969|
|August 1969||·||September||·||October 1969|