British Isles DNA by County
Irish Church Records
For a good discussion of church records in Ireland, see James G Ryan, Irish Church Records.
Once you know that name of the civil parish where your ancestor lived and his denomination, you can find the church that your ancestor probably attended by using Brian Mitchell, A Guide to Irish Parish Registers. It is an alphabetical listing by county of all civil parishes in Ireland and the Church of Ireland, Roman Catholic, Presbyterian, and other Protestant congregations associated with that parish. Each civil parish has a map reference number so that you can find the parish in Mitchell's A New Genealogical Atlas of Ireland.
Many church records are on microfilm through the Family History Library. To locate Northern Ireland church records that are not listed in the Family History Library Catalog, see An Irish Genealogical Source: Guide to Church Records, Public Record Office of Northern Ireland.
Catholic Parish Registers of Ireland. Catholic church records were not among the records destroyed in 1922 because they were not in the Public Record Office. The majority of the surviving Catholic Parish Registers have been microfilmed. Many are available from the Family History Library. See the Family History Library Catalog under IRELAND [COUNTY] [CIVIL PARISH] - CHURCH RECORDS. Maps of the Catholic parishes can be found in John Grenham, Tracing Your Irish Ancestors.
Index to prerogative marriage license bonds for the Church of Ireland ca. 1750-1849. This alphabetical index lists name of groom, name of bride, and year of marriage license bond. It does not list place of marriage. Film 0100876.
Index to Church of Ireland diocesan marriage licenses. These pre-1845 licenses were issued to Catholics as well as Protestants. Most of the actual licenses were destroyed in the 1922 fire; only the indexes survived. The complete set on 15 rolls of film 0100859 - 0100872. Years vary by diocese.
Index to Irish Marriages . . . in Walker's Hibernian Magazine 1771-1812 on Family Tree Maker CD 275.
PRONI Card index to Church of Ireland parish registers is on film 1238732 item 4.
PRONI Card index to Presbyterian registers [Northern Ireland] is on film 1238732 item 3.