| DUILLEAG = [http://www.downdc.gov.uk/Home.aspx A' Chomhairle]
}}
'S e siorramachd ([[Gaeilge]]: [[Contaetha na h-Eireann|Contae]]) ann am [[Èirinn]] a tha ann an '''Contae an Dúin'''.<ref>[http://www.smo.uhi.ac.uk/gaeilge/focloiri/abhair/contaetha/ Sabhal Mòr Ostaig]</ref> ([[An tuiseal ainmneach|tuiseal ainmneach]]: '''An Dún''').<ref>[http://www.logainm.ie/100000.aspx Logainm]</ref> Tha e suidhichte ann an àirde an ear-thuath na [[Dùthaich|dùthcha]], ann an [[Còigeamh Uladh]]. Tha 416,600 duine a' fuireach san t-siorramachd fad 2,448km²,<ref>[http://homepage.tinet.ie/~cronews/geog/census/copop.html Scoil Cronáin Naofa]</ref> an 12mh siorramachd as motha na dùthcha a thaobh fharsaingeachd agus an dàrna a thaobh àireamh-sluaigh. Tha crìochan aig Contae an Dúin le [[Contae Lú|Lú]], [[Contae Aontroma|Aontroma]] agus [[Contae Ard Mhacha|Ard Mhacha]].<ref>[http://homepage.tinet.ie/~cronews/ Scoil Cronáin Naofa]</ref> Bha 327,611 nan tàmh sa chontae ann an [[1841]], ron a' Ghorta Mhòir.<ref>[http://www.histpop.org/ohpr/servlet/PageBrowser?path=Browse/Census%20%28by%20date%29/1841&active=yes&mno=357&tocstate=expandnew&display=sections&display=tables&display=pagetitles&pageseq=first-nonblank Cenus of Britain 1841]</ref> 'S e Sliabh Dónaird (850m) a th'ann [[Beinn|a' beinn]] as àirde na siorramachd.<ref>[http://www.outdoorni.com/blog/2012/08/30/northern-ireland-s-county-high-points/ Outdorrs NI]</ref> Chaidh Comhairle Chontae an Dhúin a bhristeadh suas ann an [[1973]] is ùghdarrasan ionadail na bu lugha a chur na àite.<ref>[http://cain.ulst.ac.uk/hmso/macrory.htm#9 ULST]</ref>
