Teenage girl missing from Kogarah

A 14-year-old girl last seen at an inner Sydney railway station has gone missing.

Katelyn Simpson from Sydney's southern suburb of Kogarah was last spotted at Redfern Railway Station about 11am on Friday.

Police are concerned for her welfare due to her age.

She is described of being of Caucasian appearance, 160-165cm tall and has black hair with blue tips.

She was wearing black Adidas tracksuit pants with white stripes, a black Nautica t-shirt and pink joggers when she disappeared.