Article here on casualty figures for Dublin in the Irish Civil War.
Casualties of the Irish Civil War in Dublin | The Irish Story, Irish History Online
I have counted 168 killed and 695 wounded in the city and its environs. A detailed breakdown is in the article but the dead were; 51 National Army, 65 IRA and 52 civilians. This is a provisional figure, however, it may be be slightly too low.
The casualty figure for the 1922-23 conflict has never been calculated (estimates vary from 900 to 4,000) but taken together with other local studies, this suggests, tentatively, a death toll in the region of 1,500.
Edit: for the record, the latest version of this article (August 2014) put the figures somewhat higher: KIA:218, 68 Free State forces, 85 Anti-Treaty IRA and 58 civilians. The British Army suffered 6 dead and 1 RIC Inspector was killed.