Reviews provided by RottenTomatoes
Los Angeles Times:
The overall effect is of a story atomized and dying before our eyes, collapsing into smashed pulp, ground down into big-budget Kryptonite ash.
Superman IV is cinematic kryptonite. Not only could it kill the Superman series, it might also leave filmgoers feeling weak.
New York Times:
The Superman series gets more and more whimsically outrageous as it goes along.
By ordinary movie standards it's awful, but fans of cinematic dementia should have fun for about half an hour.
The earlier films in the series were far from perfect, but at their best they had some flair and agreeable humor, qualities this one sorely lacks.
More sluggish than a funeral barge, cheaper than a sale at K mart, it's a nerd, it's a shame, it's Superman IV.