CW may stand for:
In topology, a CW complex is a type of topological space introduced by J. H. C. Whitehead to meet the needs of homotopy theory.
Cwm Rhondda, taken from the Welsh name for the Rhondda Valley, is a popular hymn tune written by John Hughes.
Cwmbran (/kʊmˈbrɑːn, ˌkuːmˈbrɑːn/; Welsh: Cwmbrân [kʊmˈbrɑːn], also in use as an alternative spelling in English) is a new town in Wales.
Cwm Prysor Halt (named simply Cwm Prysor until 1953) was a railway station which served the remote rural area of Cwm Prysor, east of Trawsfynydd, Gwynedd, Wales.
Cwmavon (Welsh spelling: Cwmafon; translation: "river valley") is a hamlet about 2 miles south of Blaenavon and 4 miles north of Pontypool.
CWM FX was a foreign exchange trading firm located at the Heron Tower at 110 Bishopsgate, otherwise known as Salesforce Tower.