I had the same problem-a lot of Ireland ancestor researchers do-of not knowing where in Ireland my ancestors were from. You have the same era of ancestors as me and I found mine via Civil War pension records. (In my case, not my own ancestors records but his half-brothers and his wifes request for pension, so if there are siblings get theirs too.) So if any of your people fought in the Civil War, get those records, if you have not already. Beware of disappointment, my darned ancestors' birthplace still was listed as Ireland. It was in the half-brothers wifes request for pension that was key-she had to prove she was the wife, etc and had to give more information. (What a fantastic moment THAT was!!!!!) Another way is by looking at the Irish around your ancestors in their town or neighborhood, particularly if it was a small town. On tombstones do other Irish list their County? Maybe in the censuses one of the neighbors lists a county in Ireland instead of merely "Ireland". Not likely, but it could happen. Also the Irish neighbors obituaries might name the county/townland. I mention this because once I found out where my gggrandfather was from (New Row/Coolattin in Wicklow), I found several of his neighbors in his small New York town were also nearby in Wicklow. They really did stick together. If you get at least the county, you can look on the Irish History website (http://www.irish-roots.ie/) to try and find the townland. They have put a lot of records online-for a fee. Hope it helps and good luck!!! Patty Bainbridge Island, WA