Lee Barr, 24, from Darwen, is wanted in connection with an assault which took place earlier this month. No details about the assault have been released at this stage.
Barr has been described as 5ft 4in tall, of slim to medium build, with dark brown hair and blue eyes.
He has the word Brooklyn tattooed on his neck and two Queen tattoos on his arm.
A spokesman for Lancashire Police said: "We would now like to trace him and are asking anybody who has seen him or who has information about where he may be to get in touch with us as soon as possible."
Barr has links to Blackburn and Fleetwood as well as Darwen.
Anyone with information has been urged to contact police by calling 101 or emailing [email protected], quoting log number 1434 of October 8.