Deputy minister is a title borne by politicians or officials in certain countries governed under a parliamentary system. A deputy minister is positioned in some way ‘under’ a minister, who is a full member of Cabinet, in charge of a particular standing policy portfolio, and typically oversees an associated civil service department. Depending on the jurisdiction, a "Deputy minister" may be a Cabinet minister who regularly acts as and for a more senior cabinet minister (rare except in the case of "Deputy Prime Minister"), a junior minister assigned to assist a cabinet minister, an elected member of the governing party or coalition assigned to assist a specific cabinet minister ‘from the back benches’ (i.e., not part of the Cabinet, Government or Ministry) or a non-elected head of a civil service department taking political direction from a Cabinet minister.
