Blatná na Ostrove

{{Infobox settlement

| official_name = Blatná na Ostrove

| other_name = Sárosfa

| settlement_type = Village

| image_skyline = Blatná na Ostrove kostol 03.jpg

| image_caption =

| image_flag =

| image_shield =

| image_map =

| pushpin_map = Slovakia

| pushpin_label_position = none

| pushpin_mapsize = 250

| pushpin_relief = 1

| pushpin_map_caption = Location of the village

| coordinates = {{coord|48|00|25|N|17|26|30|E|region:SK|display=inline,title}}

| subdivision_type = Country

| subdivision_name = {{SVK}}

| subdivision_type1 = Region

| subdivision_name1 = Trnava

| subdivision_type2 = District

| subdivision_name2 = Dunajská Streda

| established_title = First written mention

| established_date = 1286

| leader_party =

| leader_title = Mayor

| leader_name = Terézia Földváry[http://app.statistics.sk/oso_2006/angl/obvod/results/tab10.jsp?sr=3&obvod=201&obec=501492 Election results 2006] {{webarchive |url=https://web.archive.org/web/20110811152147/http://app.statistics.sk/oso_2006/angl/obvod/results/tab10.jsp?sr=3&obvod=201&obec=501492 |date=August 11, 2011 }}[http://app.statistics.sk/kv2010/sr/tab9.jsp?lang=en&sr=2&obvod=201 Local election 2010 results by the Statistical Office of the Slovak Republic ] {{webarchive |url=https://web.archive.org/web/20110811150036/http://app.statistics.sk/kv2010/sr/tab9.jsp?lang=en&sr=2&obvod=201 |date=August 11, 2011 }}

| area_total_km2 = 10.77{{Cite web |url=http://datacube.statistics.sk/#!/view/sk/VBD_DEM/om7014rr/v_om7014rr_00_00_00_sk |title=Hustota obyvateľstva - obce [om7014rr_ukaz: Rozloha (Štvorcový meter)] |language=sk |date=2022-03-31 |website=www.statistics.sk |publisher= Statistical Office of the Slovak Republic|access-date=2022-03-31}}

| elevation_m = 121{{Cite web |url=http://datacube.statistics.sk/#!/view/sk/VBD_SK_WIN/om5001rr/v_om5001rr_00_00_00_sk |title=Základná charakteristika |language=sk |date=2015-04-17 |website=www.statistics.sk |publisher= Statistical Office of the Slovak Republic|access-date=2022-03-31}}

| population_footnotes = {{cite web|url=http://app.statistics.sk/mosmis/eng/run.html |title=Institute of Informatics and Statistics |url-status=dead |archiveurl=https://web.archive.org/web/20110226112651/http://app.statistics.sk/mosmis/eng/run.html |archivedate=2011-02-26 }}

| population_total = 971{{Cite web |url=http://datacube.statistics.sk/#!/view/sk/VBD_DEM/om7101rr/v_om7101rr_00_00_00_sk |title=Počet obyvateľov podľa pohlavia - obce (ročne) |language=sk |date=2022-03-31 |website=www.statistics.sk |publisher= Statistical Office of the Slovak Republic|access-date=2022-03-31}}

| population_as_of = {{abbr|2021|Population: 2021-12-31. Population density & Total area: 2021-06-30/-07-01. Elevation, Postal code & Area code (last updated): 2015-04-17.}}

| population_est = 879

| pop_est_as_of = 2008

| population_density_km2 = 90.55{{Cite web |url=http://datacube.statistics.sk/#!/view/sk/VBD_DEM/om7014rr/v_om7014rr_00_00_00_sk |title=Hustota obyvateľstva - obce |language=sk |date=2022-03-31 |website=www.statistics.sk |publisher= Statistical Office of the Slovak Republic|access-date=2022-03-31}}

| demographics_type1 = Ethnicity

| demographics1_footnotes =

| demographics1_title1 = Hungarians

| demographics1_info1 = 87.89%

| demographics1_title2 = Slovaks

| demographics1_info2 = 10.17%

| timezone = EET

| utc_offset = +1

| timezone_DST = EEST

| utc_offset_DST = +2

| postal_code_type = Postal Code

| postal_code = 930 32

| area_code = +421 31

| website = {{URL|http://www.blatnanaostrove.sk}}

|population_density_sq_mi = 34.96|area_total_sq_mi = 4.16|elevation_ft = 397}}

Blatná na Ostrove ({{langx|hu|Sárosfa}}, {{IPA|hu|ˈʃaːroʃfɒ|pron}}) 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.