As it stands, the Ryder Cup is still scheduled for September at Whistling Straits but there is talk of it being staged without fans being allowed in due to the continuing coronavirus pandemic.
The PGA Tour is planning for golf to return in June, but with the first four events on the return being played without fans, while the three golf majors being held in America have been rescheduled.
If it's deemed still too dangerous for crowds to attend sporting events come September, the talk is that the Ryder Cup would still go ahead without fans.
McIlroy, though, says he would rather the event be postponed than be played without fans - even though that would help the European team to not have to deal with the American supporters.
"I have a pretty strong view on this," McIlroy said in an Instagram Live with TaylorMade Golf.
"I get the financial implications for everyone involved... there's a lot that goes into putting on the Ryder Cup that people don't probably know or appreciate - but having a Ryder Cup without fans is not a Ryder Cup.
"For me I would much rather they delay it until 2021 than play it at Whistling Straits without fans. And that's from a European going to America, knowing that I'm going to get abuse!"
The four-time major champion has previously said he felt more pressure playing in the Ryder Cup rather than in majors.
And he continued: "Obviously it would be better for Europeans to play without fans because we wouldn't have to deal with some of the stuff that you have to put up with - but at the same time it's not a Ryder Cup.
"It wouldn't be a great spectacle, there'd be no atmosphere, so if it came to whether they had to choose between not playing the Ryder Cup or playing it without fans, I would say just delay it for a year and play it in 2021.
"If they do delay it until 2021, the next Ryder Cup is supposed to be in Italy, and we know how badly affected Italy was by coronavirus, so it gives that country an extra year to prepare for the Ryder Cup in 2023 instead of 2022.
"This is only one opinion but if we have to play the Ryder Cup behind closed doors this year, I'd rather just delay it."
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