Clara Bog is one of the largest relatively intact raised bogs remaining in Ireland. It lies southeast of the R436 regional road between the village of Ballycumber and the town of Clara, in County Offaly. Much of the bog is state-owned and managed as a nature reserve covering some 460 ha. A Special Area of Conservation covers 836 ha.

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.