A 15-year-old boy was among 39 football fans sentenced for "appalling" disorder at a protest, police have said.
Manchester United's game against Liverpool was postponed in May last year after about 200 fans broke into Old Trafford to protest against the Glazer family's ownership of the club.
It was "clear" some protesters "were there to cause trouble", Greater Manchester Police (GMP) said.
Offences included assault, criminal damage and burglary.
Many of the defendants, aged from 15 to 52, also received football banning orders, preventing them from attending matches for a set period of time.