Ferguson's 10&9 margin of success over German Michael Hirmer in the 36-hole final was the biggest since T R Shannon beat Sandy Lyle also by that amount - coincidentally also at Royal Liverpool - back in 1974.
The 17-year-old Scottish Boys' Order of Merit leader from Bearsden in Glasgow, playing in the championship for the first time, boldly said on reaching the quarter-finals on Friday: "I did not want to enter until I thought I could win." He certainly made no mistake with his timing.
Runner-up in the Scottish Boys' Strokeplay Championship, Ferguson is now a full-time amateur and he will be in the Great Britain and Ireland team to face the Continent of Europe for the Jacques Leglise Trophy at the end of the month at Harlech in North Wales.
A 4&3 victory over another rising star, 15-year-old Bradley Moore, saw Ferguson in to the final, and he was really fired up for the title showdown. The Glasgow teenager was in control virtually the whole way, but it was after lunch that he really piled on the pressure.
Winning the final hole of the morning round to establish a four-hole lead was significant, and on the resumption it really was one-way traffic. Ferguson won the opening two holes of the second round and then took four holes on the bounce from the 24th to close out the game.
The new champion had already made it clear that he had no intention of going to college in America, saying: "I dropped out of school when I was 16 and I now just want to become the best golfer around, playing at all different levels."
After being crowned champion, Ferguson said: "It has not yet sunk in. I knew I had been playing well enough to win, but it's on the day that counts. It is a gruelling, six-day competition and you cannot really afford one bad day."