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{{Infobox_Lääni|
name=Western Finland|
name_fin=Länsi-Suomen lääni|
name_swe=Västra Finlands län|
isocode=LS|capital=[[Turku]]|governor=[[Rauno Saari]]|
historical=[[Finland Proper]]<br>[[Satakunda]]
<br>[[Ostrobothnia (region)|Ostrobothnia]]|
regions=[[Finland Proper (region)|Finland Proper]]<br>[[Central Finland]]
<br>[[Central Ostrobothnia]]<br>[[Pirkanmaa]]
<br>[[Satakunta (region)|Satakunta]]<br>[[Ostrobothnia (region)|Ostrobothnia]]
<br>[[Southern Ostrobothnia]]|
arearank=2nd|area=74,185|areapercent=Not ranked|population_as_of=2002|
populationrank=2nd|population=1,839,581|
populationpercent=|populationdensity=24,8|
coatofarms=[[Image:West Finland.png|Coat of Arms]]|
map=[[image:Map Province of Western Finland.png|150px|Map]]|
}}