Leah McNamara is an Irish actress. She starred in the film Metal Heart (2018) and the Sky Max thriller Then You Run (2023). She also appeared in the History series Vikings (2017–2019), the BBC One–RTÉ crime drama Dublin Murders (2019), and the BBC Three–Hulu miniseries Normal People (2020).

McNamara is from Castletroy, a suburb of Limerick. Her uncle is opera singer Paul McNamara

McNamara attended Castletroy College. She went on to study Drama and Theatre at University College Cork and train at Bow Street Academy.