Ireland, Civil Registration Indexes 1845-1958

You can now find the FamilySearch transcription of Irish BMD indexes online. The coverage is for Protestant marriages from 1845, and all BMDs from 1864 to 1958 (the Republic of Ireland from 1922 to 1958.) Scroll down on the same page for more coverage detail.

Note the clickable more>> in the bottom left of the search box which extends the search options, and the ability to specify an exact, exact and close, or exact close and partial matches.

If your knowledge of Irish geography is as poor as mine you might like to consult the Connors Genealogy map of registration districts.

I don't at present see a way to find the potential partner to a marriage knowing the volume and page for the registration of one of the pair, as is possible with FreeBMD.