Croesyceiliog (Welsh pronunciation: [ˌkrɔɨs ə ˈkɛiljɔɡ] ⓘ; 'Cockerel's cross') is a suburb of Cwmbran, Wales.

Croesyceiliog is primarily a residential district and contains a wide variety of housing from Victorian terraces and even older Welsh cottages to property built between 1930 and 1970 and newer developments within the area.

Croesyceiliog also has a lawn bowls team which play at Woodland Road Sports Grounds.

Woodland Road Park is a recreation area which contains a bowling green, rugby pitch, tennis courts, outdoor paddling pool and adventure playground.

The Croesyceiliog bypass was built in the 1960s and forms part of the main A4042 road between Newport and Abergavenny.