In chemistry, a fluoroanion or fluorometallate anion is a polyatomic anion that contains one or more fluorine atoms. The ions and salts form from them are also known as complex fluorides. They can occur in salts, or in solution, but seldom as pure acids. Fluoroanions often contain elements in higher oxidation states. They mostly can be considered as fluorometallates, which are a subclass of halometallates. However some fluoroanions contain non-metals.
Anions that contain both fluorine and oxygen can be called "oxofluoroanions" (or rarely "fluorooxoanions").
The following is a list of fluoroanions in atomic number order.