Police cars were smashed by flying objects as violence erupted between protesters at an event organised by Tommy Robinson.
Hundreds of people gathered as the far right activist arrived in the Limeside area of Oldham on Saturday evening.
People reported seeing bricks and eggs being launched into the crowds as tensions flared on the residential roads around Seventh Avenue.
Scores of police officers, armed with shields and batons, attempted to separate both sides during the incident.
An eyewitness, who didn't want to be named, said: "I saw bricks being thrown into the crowds. There were police with shields and batons, and the Tactical Aid Unit were there.
"There were several dozen police. At the start there were eggs being thrown, but then people turned to bricks."
The EDL founder is campaigning to become an MEP in the European Elections.
Earlier this month, a member of the public was filmed throwing a milkshake at the far right activist during a previous visit to Warrington.
A spokesperson for GMP confirmed damage was caused to two police cars.
Manchester City captain Vincent Kompany speaks out about Brexit, racism and 'lunatic' Trump
They said no one was injured, but officers would remain in the area for 'some time'.
Chief Superintendent Neil Evans, Territorial Commander for Oldham, said: “Everyone has the right to free speech and we will always do our best to facilitate this so people can exercise this right in a safe environment.
“This evening, people took advantage of this and turned to violence, throwing objects including eggs and bricks. We understand that many of those involved were not from Oldham.
“Whoever is responsible, this behaviour will not be tolerated by GMP, our partners or the people of Oldham.
“Police officers responded quickly to the disorder and dispersed those involved. Fortunately, no-one was seriously hurt and damage was only caused to vehicles.
Stabbed in the neck: Murder investigation as man dies after horrific 20-minute street fight
“Now the incident has come to a close and people in the area have dispersed, our attention turns to the investigation into the circumstances that surround it. Those involved can expect to be arrested and dealt with robustly.
“There are a number of videos circulating on social media so we know that people have information that could be useful to us and I’d encourage those who have to get in contact with us.
“Patrols will remain in the area for some time for reassurance and to deal with any further concerns in the local area so, as always, please feel free to speak directly to officers.
“We are working very closely with our partners and communities and are determined that the cohesion in Oldham is not damaged by today's events.”
Anyone with footage or images is encouraged to send them to scd.cctv@gmp.police.uk
Manchester City captain Vincent Kompany speaks out about Brexit, racism and 'lunatic' Trump
