The invention relates to polynucleotide agents targeting a Patatin-Like Phospholipase Domain Containing 3 (PNPLA3) gene, and methods of using such polynucleotide agents to inhibit expression of a PNPLA3 gene and methods of treating subjects having Nonalcoholic Fatty Liver Disease (NAFLD) and/or a PNPLA3-associated disorder.