Mo Moulton (born 1979)^[1] is an American^[2] author and historian of 20th century Britain and Ireland, interested in gender, sexuality, and colonialism/postcolonialism. They are a senior lecturer in the history of race and empire at the University of Birmingham.^[3][4]

Moulton was born in New York in 1979 and grew up in Massachusetts.^[5] They majored in history as an undergraduate at the Massachusetts Institute of Technology, graduating Phi Beta Kappa in 2001.^[6] After working for non-profit organisations, they returned to graduate study at Brown University, earning a PhD in 2010.^[3]

Moulton became a lecturer at Harvard University from 2010 until 2016 before moving to the University of Birmingham^[3] as a senior lecturer.^[7]

They were elected to the council of the British Association for Irish Studies for the 2021–2023 term.^[8]

Moulton identifies as "queer, trans, and nonbinary" and uses singular they as their preferred pronoun. At Birmingham, they are a founder of the College of Arts & Law Trans Support Network.^[5]

• Ireland and the Irish in Interwar England (Cambridge University Press, 2014).^[9] Runner-up (proxime accessit) for The Whitfield Prize in 2015^[10]
• The Mutual Admiration Society: How Dorothy L. Sayers and Her Oxford Circle Remade the World For Women (Basic Books, 2019) about The Mutual Admiration Society.^[11] Winner of the 2019 Agatha Award^[12] and the 2020 Anthony Award,^[13] in their respective non-fiction categories.