Blue Ball, historically known as Pallas, is a small village in County Offaly, Ireland. It is 9 km southwest of Tullamore, at the junction of the N52 and the R357 roads, in the civil parish of Killoughy. Pallas Lough, also in the civil parish of Killoughy, is a small fishing lake located to the east of the village. Butterfield Estate, near Blue Ball, hosts an annual agricultural and livestock show, the Tullamore Show.