According to a park news report, the woman approached the bison within ten feet on Monday morning, and two other people were within 25 yards of the animal.
The woman from Grove City, Ohio, suffered a puncture wound as well as other injuries.
Emergency medical personnel from Park reacted and transferred her to a hospital in Idaho by ambulance.
According to park officials, this is the first time a bison has been gored this year. Bison are unpredictable, have wounded more people in Yellowstone than any other animal, and can sprint three times faster than humans, according to the park statement.
Visitors must stay at least 25 yards (23 metres) away from bison, according to park rules. According to the park statement, two additional people were within 25 yards of the bison.