The Győr comitatus arose as one of the first comitatus of the Kingdom of Hungary.
Its southern part was conquered by the Ottoman Empire in 1543.
The Ottoman Empire meant a constant threat to the Habsburg Kingdom of Hungary therefore the Habsburg kings divided the kingdom's remaining territory into captaincies.
The Captaincy of Győr was located between lake Balaton and river Danube.
In 1594, the Ottomans captured the city Győr, however an Habsburg-Hungarian army reconquered it in 1598.
The other parts of Győr County were liberated from Ottoman rule in the 1680s.

In 1920 the Treaty of Trianon assigned a very small part of the territory of the county to Czechoslovakia.
The rest stayed in Hungary and merged with the eastern part of Moson county and a very small part of Pozsony county to form Győr-Moson-Pozsony county in 1923.

The county became abolished after World War II and Győr-Moson county was created instead.
In 1950, Sopron county merged with Győr-Moson county to form Győr-Sopron county.
This county was renamed to Győr-Moson-Sopron in 1990.
The part of the county north of the river Danube is now in Slovakia, Trnava Region.
The Győr comitatus arose as one of the first comitatus of the Kingdom of Hungary. Its southern part was conquered by the Ottoman Empire in 1543. The Ottoman Empire meant a constant threat to the Habsburg Kingdom of Hungary therefore the Habsburg kings divided the kingdom's remaining territory into captaincies. The Captaincy of Győr was located between lake Balaton and river Danube. In 1594, the Ottomans captured the city Győr, however an Habsburg-Hungarian army reconquered it in 1598. The other parts of Győr County were liberated from Ottoman rule in the 1680s.
In 1920 the Treaty of Trianon assigned a very small part of the territory of the county to Czechoslovakia. The rest stayed in Hungary and merged with the eastern part of Moson county and a very small part of Pozsony county to form Győr-Moson-Pozsony county in 1923.
The county became abolished after World War II and Győr-Moson county was created instead. In 1950, Sopron county merged with Győr-Moson county to form Győr-Sopron county. This county was renamed to Győr-Moson-Sopron in 1990. The part of the county north of the river Danube is now in Slovakia, Trnava Region.
Győr County