Counties of Iceland
|Coordinates: IS 64°28′0″N 21°40′0″W / 64.46667°N 21.66667°W|
|Time zone||GMT (UTC+0)|
Borgarfjarðarsýsla was a county of Iceland, located in the Western Region of the country. Its only city is Akranes. Along the southern border of the county with Kjósarsýsla, is the waterfall Glymur located, which is notable for being Iceland's tallest waterfall.