Leah O'Rourke (born 12 November 1988) is an actress from Northern Ireland. She is best known for her role as Jenny Joyce in the Channel 4 comedy series Derry Girls. O'Rourke rose to prominence in 2018 following her supporting role in the comedy series, Derry Girls.

O'Rourke won a best supporting actress award for her role in feature film The Spin 2025

Outside of Derry Girls, O'Rourke has appeared in several short films, including Anna (2013), and Normality (2014). In 2016 O'Rourke played the character of Siobhán in the award-winning film Half Brothers. O'Rourke has spoken about how she auditioned for the critically acclaimed drama series, Normal People. Aside from acting professionally, O'Rourke has also worked as a drama tutor in the Fermanagh School of Music and Performing Arts.

In 2023, O'Rourke took part as a contestant on the sixth series of Dancing with the Stars, paired with John Nolan

Leah is also the niece of actor John Lynch and actress Susan Lynch.