Coca-Cola remains Ireland's most popular brand but three Irish brands are featuring in the Top five bestsellers.
Avonmore, Brennans Bread and Tayto are second, third and fifth respectively, in the list compiled by Checkout Magazine, in association with Neilsen research.
Checkout's Stephen Wynne-Jones says there's a certain element of loyalty, but most consumers are looking for good quality:
"I think there's an element of loyalty to certain Irish brands, but also there's quality perceptions there as well," he said.
"People view Irish brands as being as good if not better than their international counterparts - and as long as the value perception is there and the quality perception is there, people are going to keep looking for a quality to Irish brand."
Checkout Top 100 Brands 2015 - The Top 20
2. Avonmore Milk
4. Cadbury Dairy Milk
14. Irish Pride
20. Red Bull