The study examines the population processes of Borsod-Abaúj-Zemplén County and the correlations of the participants in adult training between 2010 and 2019. The County's resident population is steadily declining, with the decline exceeding 110,000 over the past 20 years. The number of deaths each year exceeded the number of live births. The County has a slow process of depopulation and is characterized by aging. The county is characterized by significant migration losses, due to high unemployment and a relatively low employment rate.