The driver fled the scene and has not been located, police say.
Investigators say 63-year-old Daniel McKay was crossing Backlick Road near Edsall Road when he was struck.
According to police, McKay was not using a crosswalk.
They responded to the scene around 6:30 p.m., and rescue personnel confirmed that McKay had died.
If you have any information that might help police in their investigation, call (703) 280-0543.