This chapter covers a selection of acyl complexes and synthetic applications published within the past two decades. Iron acyl complexes are useful building blocks for organic synthesis. This survey covers recent synthetic applications of a selection of acyl complexes published within the last two decades. Herein, acyl complexes derived from carbonyl iron reagents are discussed, besides cyclopentadienyl dicarbonyl iron compounds, their phosphine‐substituted chiral‐at‐iron derivatives and diiron acyl complexes. This chapter has been organized according to the above classification with additional ligands and their reactivity, for example allyl, dienes.