A commote (Welsh cwmwd, sometimes spelt in older documents as cymwd, plural cymydau, less frequently cymydoedd), was a secular division of land in Medieval Wales. The word derives from the prefix cym- ("together", "with") and the noun bod ("home, abode"). The English word "commote" is derived from the Middle Welsh cymwt.
The basic unit of land was the tref – a small village or settlement. In theory, 100 trefi made up a cantref (literally, "one hundred settlements"), and half or a third of a cantref was a cymwd although in practice the actual numbers varied greatly. The plural of cantref is cantrefi. Together with the cantrefi, commotes were the geographical divisions through which defence and justice were organised. In charge of a commote would be a chieftain probably related to the ruling Prince of the Kingdom. His court would have been situated in a special tref, referred to as a maerdref. Here the bonded villagers who farmed the chieftain's estate lived, together with the court officials and servants. Commotes were further divided into maenorau or maenolydd.