Emma Lee Kowlaski, 15, was last seen in the Mandurah area last Saturday morning. Credit: WA Police

Police are desperately searching for a teenage girl who has been missing from WA’s Peel region for nearly one week.

Emma-Lee Kowlaski, 15, was last seen in the Mandurah area on Saturday morning.

She prefers to go by the name “Lee” and is described as having long brunette or red hair.

Concerns are held for her welfare.

Anyone with information is urged to contact police immediately on 131 444.