Fire officials say the incident took place around 4:45 p.m. in the 1400 block of Doctor Jack Road near Conowingo.
The man had been standing under a tree when a lightning bolt hit a nearby woodpile, igniting a fire.
The man was injured by the indirect lightning strike and was taken to Christiana Hospital in Delaware.
The man is now awake and is said to be in stable condition.
No one else was injured in the incident.