The 18th constituency of Paris () is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system. It is based in the north of the department. In the 2010 redistricting of French legislative constituencies, the 18th stayed covering the same area of Paris, with a small boundary change.
Before the 1986 redistricting of French legislative constituencies, the 18th constituency referred to a constituency in the South-West of the city.
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Elections between 1988 and 2007 were based on the 1988 boundaries. The 18th constituency had minor boundary changes in the 2010 redistricting of French legislative constituencies.
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