Have you seen missing man Joshua Saysana?

Police have appealed to the public for helping finding a missing teenager who was last seen in Bonython on Thursday afternoon.

ACT Policing described Joshua Saysana, 19, as Asian in appearance, of slim build, about 178cm tall, with brown eyes and shoulder-length black hair that he usually tied up in a ponytail.

Mr Saysana was last seen about 4.30pm on Thursday.

At the time, he was wearing a blue soft shell jacket, black skinny pants and black Nike shoes, and carrying a backpack.

Police said officers and Mr Saysana's family were concerned for his wellbeing.

Anyone who has information about his whereabouts was urged to contact ACT Policing on 131 444.