The veteran manager described the Arsenal man as "different class" for Wales so far.
Having netted three times, Gareth Bale has stole so many of the headlines for Wales in France this summer but Warnock says that Ramsey has out-shined his Real Madrid counterpart thus far.
Chris Coleman's side, who beat Northern Ireland in the last 16 after winning Group B with England, Slovakia and Russia, face Belgium in the quarter-finals on Friday night, having taken four points of six off them in qualifying.
And Warnock believes the industrious Arsenal midfielder is going to shine once more against the star-studded Belgians in Lille on July 1.
"For me, the Welsh player of this tournament has been Aaron Ramsey without a shadow of a doubt Aaron Ramsey," he told talkSPORT. "He's been different class.
"I can see him causing problems for Belgium, with the work-rate that [Joe] Ledley and the other lads will do - he's going to get opportunities I think."
Ramsey's form in France will delight Arsenal fans, many of whom did not see the best of him for the Gunners last season.
It was a tough campaign for the Welshman and another one in which he failed to replicate the kind of goalscoring form he showed during the 2013-14 season.