- February 4 – Fairfax Circuit Court Judge Paul E. Brown signs an order creating a 25-acre enclave of Fairfax County containing the Fairfax County Courthouse within the City of Fairfax.
- February 15 – 35-year-old Patricia R. Steele is shot and mortally wounded by her ex-husband Herbert at her home at 6925 Oak Ridge Road in Falls Church. Steele manages to stagger to a neighbor's house before collapsing and is taken to the Fairfax Hospital, where she dies.
- "Fairfax County Get Its Courthouse Back" Evening Star, 6 Feb. 1966, Four Star, p. 23. NewsBank. Accessed 24 Dec. 2017.
- Boyd, Kenneth. "Girl Says She Battled Father After He Shot Her Mother." The Washington Post, Times Herald (1959-1973): 1. Feb 17 1966. ProQuest. Web. 20 May 2014.
|Fairfax County by Year: 1966|
|January 1966||·||February||·||March 1966|