The medal haul of 498 was 138 up on last year and included 33 golds.
M&S topped the medal table with 169 in total, including 12 gold and 52 silver. Golds included its £13 Mount Bluff NV Sparkling Chardonnay.
Tesco took five golds, Sainsbury’s and Morrison four each and Waitrose three.
Aldi won gold for two wines that retail for under £8. Asda and the Co-operative own-brands also won golds.
IWC co-chairman Charles Metcalfe said: "Supermarket buyers have demonstrated their talent for sourcing fantastic wines from all around the world, usually at pretty keen prices.
“It is fantastic that supermarkets are offering such extensive ranges of different styles and that UK shoppers can get top quality wine on their doorsteps.”
It was also a record year for English sparkling wine with 14 wines picking up gold medals.
Two of them went to East Sussex producer Court Garden.