Manning was last seen in Mount Pearl. The Royal Newfoundland Constabulary received a missing person report Monday.
In a news release, she is described as 5-6 and 110 pounds with long, blonde hair and blue eyes. When she was last seen, she was wearing blue jeans and a baseball hat.
Police are asking the public for assistance in finding Manning. Anyone with information that may help is asked to contact the RNC at 729-8000 or Crime Stoppers at 1-800-222-8477. Information can be provided anonymously online at www.nlcrimestoppers.com.