Encyclopedias, Almanacs, Transcripts, and Maps
- Ireland, John
- Ireland, John, Bl.
- Ireland, Seraphine, Mother
- Ireland, The Catholic Church in
- Irenaeus, St.
- Irene of Portugal, St.
- Irene, Byzantine Empress
- Irenicism
- Irgun ?eva'i Le'ummi
- Irish Catholic Colonization Association of the U.S.
- Irish Christian Brothers
- Irish Colleges on the Continent
- Irish Confessors and Martyrs
- Irish Crosses
- Irmengard, Bl.
- Irmgardis of Cologne, St.
- Irmhart, Öser
- Irmina, St.
- Irnerius
- Iron Guard