Mynydd Isa ([ˌmənɨ̞ð ˈɪsa]; Welsh: Mynyddisa) is a village in Flintshire, in north-east Wales.

It lies between the county town of Mold, and Buckley (which it is contiguous with) in the community of Argoed which had a population of 5837 according to the 2011 census.

Eventually it was written in the Anglicised form 'Baal' - still correctly pronounced to rhyme with "Carl".

(The Mercia on Mercia Drive closed in 2010, and is now a supermarket), various shops and the village centre which houses a cafe 'Caffi Isa', a community interest group located in the old library and other clubs and associations.

The village has a large youth organisation (established in 1984) with football teams representing the village in the county league from 7 to 16 years old and adult football dating back to the 1930s; however the adult team disbanded in 2009.