Need a good laugh? Apparently millions of us do — and that should come as no surprise.

When a revival of the 1990s sitcom “Roseanne” aired Tuesday night, producer and star Roseanne Barr said she hoped 6 million people might tune in.

Surprise! The premiere got three times that many viewers — 18.2 million adults, according to preliminary overnight ratings.

That’s including the millions of nostalgic old fogies who remember watching the original series before it went on hiatus 21 years ago.

How could this be? The preposterous thing about all this is that Barr these days is a proud self-described “deplorable” — an unapologetic supporter of President Donald Trump. So is her character on the revived sitcom.

By now it’s conventional wisdom that there’s nothing funny to be said about Trump or Trump supporters. If there were anything funny to say, the late-night hosts — Jimmy, Jimmy and Stephen, all vehement critics of Trump — would have said it by now. But they’ve been too busy tearing down and ridiculing every decision and statement coming out of the White House since January 2017. They have not let up.

So, let’s compare the numbers: Last week’s average nightly audience for:

- Late Show with Stephen Colbert: 2.99 million.

- The Tonight Show starring Jimmy Fallon: 2.56 million.

- Jimmy Kimmel Live: 2.26 million.

Combined, that’s 7.81 million viewers for the anti-Trump late night shows — vs. 18 million for the deplorable pro-Trump “Roseanne.”

According to ABC, it was the highest rated comedy telecast on any network in nearly four years. It was also higher rated than the recent Stormy Daniels interview on CBS’ 60 Minutes, if anyone is interested.

The “Roseanne” premiere even outpaced every episode of NBC’s hit series “This is Us” — except the one immediately following the Super Bowl, of course. But that was a special circumstance.

Will these kind of demographics continue for “Roseanne”? If they do, will the mainstream media sit up and take notice? You bet they will! Television networks are desperate for shows that can attract such a large audience share. You can almost hear to semi-conspiratorial whispered threats from producers to writers to tone down the anti-administration rants.

Was the “Roseanne” premiere a watershed moment? Have the basketful of deplorables been heard? Is Roseanne Barr their new heroine and patron saint?

Maybe. We’ll see. It could just be that co-star John Goodman is a brilliant satirist with a touch of comic gold. For now, however, politics are less pronounced.