Hampshire police said Leah, 14, has not been seen since yesterday evening after leaving her home on Magnolia Way in Southampton. Her full name has not been released.
Both her family and police officers are ‘growing increasingly concerned’ for her safety.
Leah is white, around 5ft 5ins tall and of medium build. She has strawberry blonde shaved hair and a scar on her right eyebrow.
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Leah was last seen wearing a black puffer-style jacket, black leggings and black boots. She may have also been wearing a black and orange dyed belly top.
Anyone who believes they may have seen Leah or know of her whereabouts is urged to call 101 and quote incident 44210059115.