The Company of Watermen and Lightermen (CWL) is a historic City guild in the City of London. However, unlike the city's 111 livery companies, CWL does not have a grant of livery. Its meeting rooms are at Waterman's Hall on St Mary at Hill, London.
The role of watermen was to transfer passengers, while lightermen moved goods and cargo, between the Port of London and vessels moored in the River Thames. Although modern river workers are licensed by the Maritime and Coastguard Agency, the Company continues its roles arranging apprenticeships, lobbying on river matters, and organising historic annual events and ceremonies.
The company's clerk is Julie Lithgow, formerly director of the Institute of Chartered Shipbrokers.