Esclusham (Welsh: Esclus or Esclys) is a local government community, the lowest tier of local government, part of Wrexham County Borough in Wales.
The community includes the villages of Bersham, Rhostyllen, Aber-oer, Llwyneinion and Pentre Bychan, as well as a number of smaller settlements, the park at Erddig, and an area of the Ruabon Moors west of Aber-oer known as Esclusham Mountain. The population of the community at the 2011 Census was 3,515.
The name is recorded as Esclesham or Esclusham as early as 1315, likely originating in a combination of the Old English personal name Æscel with ham, "settlement"; the name is locally pronounced with stress on the second (middle) syllable, probably due to the influence of Welsh language stress patterns.
The old township of Esclusham, within the manor of Esclusham, was part of the historic Marcher Lordship of Bromfield and Yale. The Survey of topographer John Norden, carried out in 1620 within Bromfield and Yale, defined the township as follows:
[...] the towneshipp of Esclusham, beeing part of ye said manno', is bounden from Minera by a little purle of water running from the mountayne called Glas-bry, downe by the landes called Tir Kelin, and so to Clywedog vpon ye west by the landes of Hugh ap Robert ap Howell in ye manno' of Minera, and part of Glasbrie, and part of ye mountayne towardes y Groes Newydd ; but the certaine boundes vpon ye said mountayne they cannot sett downe. And from Mortyn Wallicoru' by a brooke called Holbrooke, through certaine feildes with certaine markes knowne, to a place called Aberderryn, and from thence to a place called Penissa Maeswdd Kynelleth to a brooke called yr Avon Ddu ; and from Morton Anglicoru' the said Avon Ddu doth bounde to ye towneshipp of Erddig, and from thence to Clywedoge, ioyning to ye towneshippe of Bersham in ye said manno'.