A 53-year-old white British man, believed to be the driver of the car, was arrested after Monday evening's incident, although police said they were not treating it as terrorism.
The morning newspapers splashed images of the incident across their front pages.
In a late night press conference, emergency workers said almost 50 people were injured. A total of 27 football fans were taken to hospital, while 20 others were treated at the scene.
A police cordon remained in place on Tuesday morning at the site, where litter from the previous night's festivities was strewn across the street.
“We believe this to be an isolated incident, and we are not currently looking for anyone else in relation to it,“ Merseyside Police Assistant Chief Constable Jenny Sims told reporters.
Hundreds of thousands of people had turned out in torrential rain to see the northwest English side's victory parade, many of them having travelled from across the country and abroad to celebrate.
“We could just see a commotion and a wave of people running back towards us,“ Liverpool fan Adam Hughes, 35, told AFP.
Roger Downey, a supporter who was at the parade with his wife, said that “panic” had set in amongst the crowd after police rushed past to try and stop the vehicle.
Prime Minister Keir Starmer commended the “remarkable bravery shown by the police and other emergency services”.
Images shared on social media showed the car ploughing through a crowd, running over people and others bouncing off its bonnet.
Liverpool had earlier on Monday been a sea of red as supporters packed the city's streets to celebrate winning the Premier League title with manager Arne Slot and star players including Mohamed Salah and Virgil van Dijk.
Liverpool FC said on X that they were working with Merseyside police, adding: “Our thoughts and prayers are with those who have been affected by this serious incident.”
Great rivals Manchester United wrote: “Our thoughts are with LFC and the city of Liverpool after today’s awful incident.”
In 1989, 97 Liverpool fans died in a crush at a game in the Hillsborough stadium in Sheffield.
Police were quick to share details about the suspect on Monday, including his ethnicity following the crash, which one former police chief termed “unprecedented”.
Almost a year ago, Liverpool and north England saw the worst riots in decades after false rumours spread that the attacker who stabbed three girls to death in nearby Southport was a Muslim immigrant.
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