Blatná na Ostrove (Hungarian: Sárosfa, pronounced [ˈʃaːroʃfɒ]) is a village and municipality in the Dunajská Streda District in the Trnava Region of south-west Slovakia. It has a post-office, a food store, a petrol station, and a bar. There is also a football playground and a public library in the village.

Quick Facts Sárosfa, Country ...

Blatná na Ostrove Sárosfa
Village
Location of the village
Coordinates: 48°00′25″N 17°26′30″E
Country	Slovakia
Region	Trnava
District	Dunajská Streda
First written mention	1286
Government
• Mayor	Terézia Földváry[1][2]
Area
• Total	10.77[3] km2 (4.16[3] sq mi)
Elevation	121[4] m (397[4] ft)
Population  (2021)[5]
• Total	971[6]
• Estimate  (2008)	879
Ethnicity [5]
• Hungarians	87.89%
• Slovaks	10.17%
Time zone	UTC+1 (EET)
• Summer (DST)	UTC+2 (EEST)
Postal Code	930 32[4]
Area code	+421 31[4]
Website	www.blatnanaostrove.sk

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In the 9th century, the territory of Blatná na Ostrove became part of the Kingdom of Hungary. After the Austro-Hungarian army disintegrated in November 1918, Czechoslovak troops occupied the area, later acknowledged internationally by the Treaty of Trianon. Between 1938 and 1945 Blatná na Ostrove once more became part of Miklós Horthy's Hungary through the First Vienna Award. From 1945 until the Velvet Divorce, it was part of Czechoslovakia. Since then it has been part of Slovakia.

• István Bittó (1822–1903), a Hungarian politician, Prime Minister of Hungary from 1874 to 1875, was born here.

• List of municipalities and towns in Slovakia