Niall O'Brien is a name shared by several individuals of Irish origin associated with sports, the arts, and the church. This disambiguation article lists the notable people who have borne the name, with brief context to distinguish them.
The name Niall O'Brien is most commonly associated in cricketing circles with the Irish wicket-keeper batsman born in 1981. However, the name is also borne by figures from acting, hurling, and missionary work. The persons listed below are unrelated unless explicitly noted.
| Name | Years | Field | Nationality |
|---|---|---|---|
| Niall O'Brien (actor) | 1946–2009 | Film and stage acting | Irish |
| Niall O'Brien (cricketer) | born 1981 | Cricket | Irish |
| Niall O'Brien (hurler) | born 1994 | Hurling | Irish |
| Niall O'Brien (priest) | 1939–2004 | Columban missionary priest | Irish |
Born in 1981, Niall O'Brien is an Irish cricketer. He is the most frequently referenced bearer of the name in cricketing literature and statistical databases.
Niall O'Brien (1946–2009) was an Irish actor known for his work in film and television.
Born in 1994, Niall O'Brien is an Irish hurler associated with the Gaelic Athletic Association sport of hurling.
Niall O'Brien (1939–2004) was an Irish Roman Catholic priest of the Missionary Society of St. Columban, commonly known as the Columban Fathers, with extensive missionary work overseas.
The shared name reflects the prevalence of Niall as a traditional Irish given name and O'Brien as one of the most widespread Irish surnames, derived from the Gaelic Ó Briain. Disambiguation is therefore necessary in encyclopaedic, sporting, and biographical contexts.