For seventy-one years Mary Immaculate accepted only female students. The classroom was a vocation as much as a profession in Catholic Ireland, and the assumption was that women would teach the youngest children. The first cohort in 1902 came almost entirely from Munster farms and small towns, sent by parish priests who knew the bright girls.

Men were admitted for the first time in 1969. The change came at the same moment a new state-driven curriculum was reshaping Irish teacher training, pushing it from a two-year diploma toward a full degree. In 1974 the three-year Bachelor of Education began; the first graduates walked across the stage in 1977. By the 1980s the demand for primary teachers had softened, and the college diversified into liberal arts. The first PhD was conferred in 2003.

Until 1994, Mary Immaculate degrees came from the National University of Ireland. Then the academic affiliation switched to the University of Limerick, a few kilometers across the city, and degrees have been conferred by UL ever since. MIC remains technically distinct - its own campus on South Circular Road, its own ethos rooted in Catholic education, its own president - but it is woven tightly into the UL constellation, sharing students, libraries, and the academic calendar.

The Sisters of Mercy held the presidency from 1898 until 1999, when the order's gradual withdrawal from frontline education in Ireland reached the college. Lay academics have led MIC ever since. Professor Eugene Wall served from 2018 to 2024, succeeded by Professor Dermot Nestor. The handover ends one of the longer institutional continuities in Irish higher education - more than a century of nuns shaping how Irish children would learn to read.

Mary Immaculate is not just classrooms. The Lime Tree Theatre - a 510-seat purpose-built venue - opened on the campus on 30 October 2012, and immediately became one of Limerick's principal performance spaces, hosting touring drama, music, and conferences alongside student productions. Wired 99.9FM broadcasts from the campus as Limerick's only student radio station with a full broadcast licence, run jointly with the Technological University of the Shannon.

The alumni roll runs from Pulitzer-adjacent letters to pop music to politics. Una Healy left after first year to join the Saturdays. Roisin Meaney has written bestselling fiction. Pat McDonagh founded Supermac's, Ireland's homegrown fast-food chain, the year he graduated. A dozen Limerick and Tipperary hurlers - Declan Hannon, Cian Lynch, Aaron Gillane, Ronan and Brendan Maher - trained as primary teachers between matches that delivered All-Ireland titles.

The Limerick campus is set on grounds that include Mount Convent on O'Connell Avenue - a former Sisters of Mercy residence now used as postgraduate housing. A second campus operates in Thurles, County Tipperary, where MIC trains post-primary teachers in subjects such as Business Studies, Accounting, Religious Studies, Gaeilge, Mathematics, and Home Economics. The Thurles operation absorbed what had been St Patrick's College Thurles, another Catholic teacher-training institution, when that college transferred its programmes to MIC in 2016.

Close to ten percent of MIC's roughly five thousand students are mature learners - higher than most Irish third-level institutions - and the college runs deliberate access pathways for disadvantaged students, students with disabilities, refugees, and members of the Traveller community. The Erasmus program brings students from across Europe and beyond; outgoing exchanges send Irish students to St John's in New York, Loyola Chicago, the University of Turku, and Australian Catholic University in Melbourne.