The AEG C.I was a two-seat biplane reconnaissance aircraft built by the (AEG) during the First World War for the Imperial German Army's () Imperial German Air Service (). It was a modified version of the B.II training aircraft with a machine gun added for the observer, a more powerful engine and different wings. First flown in 1915, it remained in front-line service until mid-1916, after which it became a trainer.
The C.I was based on the B.II although it was fitted with a water-cooled Benz Bz.III straight-six piston engine and the two-bay wing planform had been changed. It did retain the B.II's wing-folding mechanism. The rear cockpit was modified to accommodate an observer armed with a single machine gun, usually a Parabellum MG 14 or, more rarely, a Bergmann MG 15nA.
The Inspectorate of Flying Troops () ordered a batch of six C.Is in early 1915 and the first aircraft was completed in March. Sixty-four more were ordered in four batches over the next several months. Front-line strength peaked at 34 aircraft on 28 February and 30 April 1916 and they were then transferred to training units as no C.Is are shown assigned to front-line units on 30 June.