Sesswick is a community in Wrexham County Borough, Wales.

[1] The area was historically part of Denbighshire, where it was one of the townships of the parish of Bangor Monachorum (Bangor-on-Dee).

The name Sesswick, recorded as Sesewyke in 1286, is one of the names indicating an early English presence in this part of north-east Wales; it is possibly derived from the Old English personal name "Seassa", along with -wic, meaning "settlement".

[2] However, the Wrexham historian Alfred Neobard Palmer, noting that the name was recorded as Chespric (actually Chespuic) in the Domesday of Cheshire, speculated that it may have come from "Chadswick" in reference to land in the township being owned by St. Chad, the first bishop of Mercia.

[3] The community's only village is Cross Lanes: it also includes several small hamlets (though no settlement itself having the name of Sesswick).