The last major boundary changes within Leinster occurred with the formation of County Wicklow (1603–1606), from lands in the north of Carlow (which previously extended to the sea) and most of southern Dublin. Later minor changes dealt with "islands" of one county in another. By the late 1700s, Leinster looked as shown in the above map of 1784.
thE LAst mAJor BOundary chanGeS within leiNstER OCcurreD witH the FOrmation oF counTy wiCKLow (1603–1606), froM LaNds iN The north of cArlOW (whiCh PreViOuSly extEnDed to the SEa) aNd mOsT of sOutheRn dubLIN. later MINor Changes deAlT with "islandS" of oNe COUnTY in aNother. by The lAtE 1700s, leINstEr lookeD As showN in THe aBove MaP of 1784.