Its territory is now part of Hungary, except seven villages on the left side of the Danube which belong to Slovakia.
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.
In 1920 the Treaty of Trianon assigned a very small part of the territory of the county to Czechoslovakia.
The part of the county north of the river Danube is now in Slovakia, Trnava Region.
Győr and Moson counties after the Treaty of Trianon. In 1923, the two counties were merged to form Győr-Moson County. The map shows that small part of the former Pozsony County that remained in Hungary. (2) the city of Győr (urban county). (4) territory assigned from Moson County to Sopron County in 1921. (5) and (6) territory ceded to Czechoslovakia in 1947.
The formation of modern Győr-Moson-Sopron County. (1) territory assigned from Vas County to Győr-Moson-Sopron County in 1950. (2) territory assigned from Sopron County to Vas County in 1950.
Ethnic map of the county (with data of the 1910 census). Key:
red
–
Hungarians
;
pink
–
Germans
;
light green
–
Slovaks
. Coloured dots in plain rectangles imply the presence of smaller minority populations. Multicoloured rectangles imply cities and villages with multi-ethnic populations with the order of the stripes following the ethnic composition of the settlement.
