Daria was last seen on Saturday at around 6pm in the Central Milton Keynes Shopping Centre.
Daria, 14, is described as white, 5ft 2ins tall, has long brown hair and is of a small build.
She is known to frequent Broughton, Wolverton, Stony Stratford, Central Milton Keynes and Downs Barns.
Inspector Steve Brisley-Heath said: “We’re growing increasingly concerned for Daria’s welfare, and I am urging anybody who knows of her whereabouts to please report this via our dedicated missing persons’ portal.
“If you see Daria, please call us immediately on 999 quoting reference 43250633418.
“I would also like to appeal directly to Daria. We and your family are concerned for you, and you are not in any trouble.
“Please contact us to let us know where you are so we can ensure that you are safe and well.”
If you see Daria, call police immediately on 999 quoting reference 43250633418.
