Violence broke out following the derby game on 11 April.
Four men were were arrested in raids across Wolverhampton on Thursday. Two others were arrested later in the day, while a seventh man handed himself in after a CCTV appeal.
All seven have been released on bailed pending further inquiries.
Birmingham City won the game 2-1, before a crowd of 19,330 at their St Andrew's ground.
Six people were arrested on the day of the game, officers said.
West Midlands Police have released CCTV images of eight remaining men they hope to trace in connection with the disorder.
Seven men arrested in connection with disorder at a Birmingham City match against local rivals Wolves have been released on bail.