|Jurisdiction||Government of the United Kingdom|
|Parent department||Office of the Second Sea Lord|
The Mobilisation Department was a former department of the Department of Admiralty responsible for mobilisation requirements, manning and war preparation planning from 1918-1930. It was replaced by the Manning Department.
The Mobilisation Division of the Naval Staff was first established in May 1917  it evolved out of the Mobilisation Division (Admiralty War Staff). On 12 January 1918 the mobilisation division of the Naval Staff was abolished, A new department was formed as the Mobilisation Department now part of the office of the Second Sea Lord. The department existed until December, 1930 when it was abolished.
The department was responsible for the planning and projecting all manning requirements and securing available resources to meet those plans.
Head of Department
Director of the Mobilisation Department
- Kennedy, Paul (24 April 2014). The War Plans of the Great Powers (RLE The First World War): 1880-1914. Routledge. p. 128. ISBN 9781317702528.
- Black, Nicholas (2009). The British naval staff in the First World War (1. publ., transferred to digital pr. ed.). Woodbridge: Boydell Press. p. 155. ISBN 9781843834427.