James Nallen (born 1973 in Castlebar) is a former Gaelic footballer who played for the Mayo county team. He is the team's record appearance holder with 132. He played in five All-Ireland finals, including an All-Ireland final replay against Meath in 1996, and won two All Stars, in 1996 and 2004. He won a National Football League medal in 2001. However, he never won an All-Ireland medal. He retired from inter-county football in 2010. He has also been a selector for Mayo. He is Chief Technical Officer at NUI Galway's School of Physics NUI Galway.