it. Today, the area that was once Borsod county is the most urbanized and industrialized area of Borsod-Abaúj-Zemplén, with 3/4 of the county's population living there. The county's three largest cities – Miskolc, Ózd and Kazincbarcika – can also be found there. In colloquial speech, Borsod county is often used to mean Borsod-Abaúj-Zemplén as a whole. Demographics Subdivisions In the early 20th century, the subdivisions of Borsod county were: Notes Sources Hungarian Catholic Lexicon (Hungarian only) (articles: Borsod, Gömör és Kishont közigazgatásilag egyelőre egyesített vármegye, Borsod vármegye, Borsod-Abaúj-Zemplén megye and Borsod-Gömör vármegye.) States and territories established in 1938 States and territories disestablished in 1923 States and territories disestablished in 1945 Counties in the Kingdom of Hungary