Police are hunting for a man after a woman was sexually assaulted as she left Flinders Street Station earlier this year.

The 26-year-old woman arrived at the station on platform 4 on an Upfield line train about 6.50pm on January 19.

An image of the man police wish to speak to in relation to a sexual assault at Flinders Street Station. Credit:Victoria Police

As she left the station she was approached by two men.