NOPG Views 5 meanings found NOPG can refer to a guild of oil painters, a paper‑goods retailer, a Dutch geothermal research program, a Greek psychotherapy organization, or a guide for parents in New Orleans. Miscellaneous National Organisation for Psychotherapy of Greece New Orleans Parents Guide International Nationaal Onderzoek Programma Geothermie Business Northwest Oil Painters Guild Night Owl Paper Goods