•
Catherine Maberly (1805–1875) Irish writer •
Aifric Mac Aodha (born 1979), poet •
Dorothy Macardle (1889–1958), novelist, playwright, historian •
Bridget G. MacCarthy (1904–1993), literary historian •
Ethna MacCarthy (1903–1959), poet •
Mary Stanislaus MacCarthy (1849–1897), nun, poet •
Doireann MacDermott (1923–2024), translator, philologist, non-fiction writer •
Marisa Mackle (born c.1973), novelist •
Eleanor MacMahon (1864–1956), romance novelist •
Kathleen MacMahon, journalist and novelist •
Charlotte Elizabeth MacManus (1850–1941), novelist •
Máire MacNeill (1904–1987), journalist, folklorist, translator •
Catherine Mary MacSorley (1848–1929), children's writer for girls, religious works •
Marie MacSweeney, poet, shortstories •
Máire MacSwiney Brugha (1918–2012), activist and writer •
Audrey Magee (active since 2000), novelist •
Bríd Mahon (1922–2008), novelist and folklorist •
Catherine Gray, Lady Manners (1766–1852), poet •
Mary Manning (1905–1999), novelist, playwright and film critic •
Alicia Catherine Mant (1788–1869), children's writer •
Harriet Evans Martin (died 1846), Anglo-Irish novelist, non-fiction writer •
Harriet Letitia Martin (1801–1891), novelist •
Mary Letitia Martin (1815–1850), novelist •
Violet Florence Martin (1862–1915), novelist, co-authored works with
Edith Somerville •
Mary Mathew (1724–1777), diarist •
Caitlín Maude (1941–1982), poet, teacher, actress, singer, wrote in Irish •
Constantia Maxwell (1886–1962), historian •
Joan McBreen (born 1947), poet •
Eimear McBride (born 1976), novelist, author of
A Girl Is a Half-formed Thing •
Kate McCabe (fl. 2005), novelist •
Felicity McCall, journalist, playwright since c.2004 •
Nell McCafferty (1944–2024), journalist, playwright, feminist •
Justine McCarthy (fl. 2000s), journalist •
Mary McCarthy (1951–2013), successful novelist •
Letitia McClintock (1835–1917), writer and folklorist •
Jenny McCudden, since c.2010, journalist, short story writer, poet •
Mary McDermott (fl. 1832), poet •
Mary McDonagh (1849–?), poet •
Rosaleen McDonagh (fl. 2000s), activist and playwright •
Paula McGrath (born 1966), novelist •
Medbh McGuckian (born 1950), Northern-Irish poet, literary writer •
Maura McHugh (fl. 2000s), writer of horror novels, plays, comic books and short stories •
Lisa McInerney (born 1981), novelist, short story writer, blogger •
Pauline McLynn (born 1962), actress, novelist •
Liz McManus (born 1947), politician, novelist •
Janet McNeill (1907–1994), novelist, playwright and children's writer •
Anna McPartlin (born 1972), novelist •
Dervla McTiernan (born c.1977), crime novelist •
L. T. Meade, pen name of Elizabeth Thomasina Meade Smith (1844–1914), prolific young adult and children's writer, mainly for girls, wrote over 300 books •
Norah Meade (1888–1954), journalist •
Roisin Meaney, Irish novelist •
A. Garland Mears (1842–1920), novelist •
Paula Meehan (born 1955), poet, playwright •
Máighréad Medbh (born 1959), poet •
A. L. Mentxaka (active since 2000s), playwright, critic, educator •
Máire Mhac an tSaoi (1922–2021), acclaimed Irish-language scholar, poet, translator •
Betty Miller (1910–1965), novelist, non-fiction writer, biographer, columnist •
Alice Milligan (1865–1953), acclaimed poet •
Anna Millikin (fl. 1793–1810) Gothic novelist •
Lia Mills (fl. 1990s), novelist, short story writer •
Susan L. Mitchell (1866–1926), poet, known for her satirical verse •
Dorothy Molloy (1942–2004), poet, journalist and artist •
Frances Molloy (1947–1991), novelist •
Mary Monck (c. 1677–1715), poet •
Sydney, Lady Morgan (1781–1859), poet, novelist, author of
The Wild Irish Girl •
Sinead Moriarty (born c. 1971), novelist •
Sinéad Morrissey (born 1972), poet •
Kathleen Mulchrone (1895–1973), Irish Celtic scholar, writer •
Rosa Mulholland (1841–1921), prolific novelist, poet, playwright, biographer •
Val Mulkerns (1925–2018)), novelist, journalist, columnist, broadcaster •
Sheila Mulloy (1922–2013), historian •
Margaret Mulvihill (born 1954), novelist and non-fiction writer •
Iris Murdoch (1919–1999), Irish-born successful British novelist, philosopher, author of
Under the Net •
Agnes G. Murphy (1865–1931), Irish journalist and writer •
C.E. Murphy (born 1973), American-born writer living in Ireland, writing using Irish mythology •
Dervla Murphy (1931–2022), touring cyclist, travel writer •
Elaine Murphy, playwright since c. 2008 •
Kathleen M. Murphy (died 1963), poet •
Maura Murphy (1928–2005), autobiographer •
Nora J Murray (1888–1955), poet, short story writer, school teacher ==N==