According to my count, 57 footballers currently registered as Irish are contracted to English Premier League clubs. 27 are senior players while the remaining 30 are part of reserve squads, development squads or academies. Some are on loan.
The first map below shows the birthplace of these Irish footballers. Birthplace could be considered a proximate measure for where players learned the game and trained from a young age. 21 were born in Dublin, 23 were born in the U.K. and the remaining 13 were born in other cities and towns outside of Dublin but in the Republic. One noticeable trend is the absence of any current Premier League players born in the West region of Ireland. The West region of Ireland consists of counties Galway (city), Mayo and Roscommon (NUTS Level III). Damien Delaney makes sure that the South West region of Cork and Kerry have a presence, albeit minimal.
The second map shows the birthplace of the current England squad and recent call-ups. There was 40 English players in the list (Raheem Sterling was removed as he was born in Kingston, Jamaica). Clusters are visible in the urban areas of London, Liverpool and Manchester. Daniel Sturridge is the only player to put Birmingham on the map.