Komárom-Esztergom (Hungarian: Komárom-Esztergom vármegye, pronounced [ˈkomaːrom ˈɛstɛrɡom]; German: Burgkomitat Komorn-Gran; Slovak: Komárňansko-ostrihomská župa) is an administrative Hungarian county in Central Transdanubia Region; its shares its northern border the Danube with Slovakia. It shares borders with the Hungarian counties of Győr-Moson-Sopron, Veszprém, Fejér and Pest and the Slovakian Nitra Region (Nové Zámky District, Komárno District). Its county seat is Tatabánya.