Komárom is a city in Hungary on the south bank of the Danube in Komárom-Esztergom County. Komárno, Slovakia, is on the northern bank. Komárom was formerly a separate village called Újszőny. In 1892 Komárom and Újszőny were connected with an iron bridge and in 1896 the two towns were united under the name city of Komárom. The fortress played an important role in the Hungarian Revolution of 1848 and many contemporary English sources refer to it as the Fortress of Comorn.

Komárom-Esztergom 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. Its county seat is Tatabánya.