The 19-year-old had been missing for the past number of days from her home in Galliagh.
Officers were working on the theory that she had left the North of Ireland on a plane.
Yesterday, police said they believed that she was in Paris.
In a message on its Facebook page this morning, PSNI Foyle say: “Our missing person Sinead Murphy has been located safe and well.
“As ever your likes, shares, retweets etc help us get the message out the quicker than anything. Thank you.”
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