To enable realization of more various data outputs.

An imaging apparatus according to the present disclosure comprises: a pixel array that photoelectrically converts, by a photoelectric conversion element, subject light incident on each of a plurality of pixels configured in a matrix state; a selection unit that selects the number of A/D conversion units for outputting a pixel signal of each pixel of the pixel array; and a control unit that controls the selection unit to select A/D conversion units whose number corresponds to a request. The present disclosure is applicable to an imaging device, a control method, and an imaging apparatus.