‘Pungnong’ is a medium-maturing potato (Solanum tuberosum L.) cultivar developed for single-cropping cultivation. It was bred from a cross between the U.S. cultivar ‘Atlantic’ and the Korean cultivar ‘Gumseo’ in 2007. Superior progenies were selected via generational advancement between 2008 and 2010. The line ‘GWP08-011’ was selected based on stable yield and desirable tuber characteristics in preliminary and advanced yield trials performed during 2011-2012. Regional adaptability trials were conducted at three locations from 2013 to 2015 under the designation ‘Gangwon 1-20’. ‘Pungnong’ produces long-oval tubers with slightly russeted yellow skin, white flesh, and very shallow eyes, leading to excellent tuber appearance. Compared with the standard cultivar ‘Superior’, it exhibited a lower incidence of physiological disorders, whereas its reactions to late blight and potato virus Y were similar. The mean tuber yield was 44.7 t ha^-1, exceeding that of ‘Superior’ (34.3 t ha^-1). Although ‘Pungnong’ has excellent tuber bulking and high yield potential, adequate pre-sprouting under diffused light and proper drainage management are recommended to ensure uniform emergence and stable production. After a growing test by the Korea Seed and Variety Service, the potato variety was registered for variety protection in January 2018 (Variety Protection No. 6923).