Rosslea ward is situated in the southeastern corner of County Fermanagh, bordering County Monaghan. The landscape is characterised by low, rolling drumlins and small loughs, with the main settlement of Rosslea village acting as a focal point. The area's economy has traditionally been linked to agriculture and local commerce. The land use is primarily pastoral, with fields demarcated by hedgerows and scattered woodlands.
A notable local landmark is the former Rosslea Hotel, a prominent building with a distinctive history in the area. The ward is traversed by the Finn River, which flows towards Clones. Community life centres around local schools, churches, and Gaelic Athletic Association clubs. The road network connects the area to nearby towns like Clones and Newtownbutler, supporting daily commuting patterns.