In its very first showing, DS3 received an 82.2% satisfaction score - the overall industry average was 77.6% - with a maximum five-star rating awarded by its owners for Performance, Service and Running Costs.
The high score means Citroën DS3 is ranked an impressive fourth in the overall results out of a total 116 models, led only by Skoda's Superb and Yeti, and the Jaguar XF.
Citroën DS3 knocked the Honda Jazz off the top spot to be crowned 'King of the Superminis', beating other rivals including the Skoda Fabia, Hyundai i20 and Volkswagen Polo.
The Citroën model's design, quality, comfort and enjoyable performance were all referenced as part of the positive owner experience.
DS3 owners also claimed to enjoy the lowest fuel costs and service repair bills in the segment.
Fredéric Soulier, Managing Director of Citroën Motors Ireland, said: "This is a simply fantastic result for DS3 and the Citroën brand.
"The JD Power survey ranks the views of real car owners in the UK so this is very meaningful recognition for a model that continues to go from strength to strength and is obviously rewarding drivers with an outstanding ownership experience.
"The Irish Dealer Network is also seeing continued growth in sales of DS3 in Ireland."