In this GWAS of RBD, we identified six RBD-associated loci in five genomic regions: two loci near SCARB2 and INPP5F and three previously reported loci near SNCA, GBA and TMEM175. Two of the loci, SNCA and SCARB2, have different and independent variants associated with RBD than those associated with PD. Here, GBA1 is linked to Parkinson disease.