Mullany is a surname. Notable people with the surname include:
James Robert Madison Mullany (1818-1887), US Navy rear admiralJohn Mullany, an Australian politician in the 1910s and '20sKate Mullany (1845-1906), early American female labor leaderMitch Mullany (1968-2008), American comedian, actor and screenwriterPatrick Mullany, former FBI instructor and agent who co-pioneered offender profilingPeter Mullany, a guitarist for Johnny Dole & The Scabs, one of the first Australian punk rock bandsAntigua honeymoon murders of newlyweds Ben (1977–2008) and Catherine Mullany (1977–2008)Patrick Francis Mullany, known as Brother Azarias, Irish-American essayist