Molly O'Brien (disambiguation)

Molly O'Brien may refer to:

• Molly O'Brien, American film producer and director
• Molly O'Brien (Deep Space Nine), character from the Star Trek franchise
• Molly O'Brien (Alien vs. Predator), character from the Alien vs. Predator franchise

• Mollie O'Brien (born 1952), American bluegrass singer