Ballycumber is a village located where the R436 regional road crosses the River Brosna in County Offaly, Ireland. It is 5 km (3 mi) west of the town of Clara, on the western edge of Clara bog. According to the 2016 census, the population of Ballycumber was 208 people.

County Offaly is a county in Ireland. It is part of the Eastern and Midland Region and the province of Leinster. It is named after the ancient Kingdom of Uí Failghe. It was formerly known as King's County, in honour of Philip II of Spain. Offaly County Council is the local authority for the county. The county population was 82,668 at the 2022 census.