The provincial Natural Resources Department says the girl was walking along a railway track near a school in New Waterford when the animal struck her from behind and scratched her face with its paws.
The animal was frightened off by a car that sounded its horn.
The girl's injuries are not considered serious.
The attack happened near the Breton Education Centre last Friday, but officials weren't notified until this week.
Natural Resources Minister Charlie Parker issued a statement saying his staff are working with school officials to make sure safety information on coyotes is available to students, staff and parents.