Aberbeeg (Welsh: Aber-bîg) is a village which lies in both Blaenau Gwent and Caerphilly County Borough, in Wales, within the historic boundaries of Monmouthshire.

Today, one of the most prominent sights in Aberbeeg area is the grade II* listed St. Illtyd's parish church, which is thought to have been built in the late 5th century, and underwent extensive renovation over the last 200 years.

A bus service between Aberbeeg and Llanhilleth, the nearest railway station on the line, runs every hour.

The term "bîg" (later "beeg") in the Welsh name, is derived from the Welsh term "pig", meaning a beak or spout, which may refer to a spot where the small stream emerges.

[3] In the TV series Fresh Meat one of the lead characters, Josie (Kimberley Nixon), states she is from Aberbeeg.