- April 11 – The Fairfax County Board of Supervisors votes 7-2 to express its intent to move the county's administrative headquarters out of the City of Fairfax.
- April 14 – 15 people are taken to the hospital and many others require first aid treatment when an appearance by singer Leif Garrett at the Harmony Hut record store in Springfield Mall draws a crowd of over a thousand.
- Associated Press. "Fairfax County Will Move Administrative Quarters." The Free Lance-Star [Fredericksburg, Virginia] 12 Apr. 1978: 6.
- Morgan, Thomas. "Pop Singer's Fans Mob Shopping Center; Many Hurt." The Washington Post (1974-Current file): 1. Apr 15 1978. ProQuest. Web. 18 Aug. 2014.
|Fairfax County by Year: 1978|
|March 1978||·||April||·||May 1978|