A focus control apparatus, comprises an area setting unit that sets a plurality of divided areas by dividing in a first direction and in a second direction, the first direction corresponding to a direction in which a focus state is detected; a focus detection unit that detects first information related to the focus state; a calculation unit that calculates defocus information on the basis of the first information; and a control unit that performs focus control on the basis of the calculated defocus information, wherein in a first mode in which the defocus information for the focus control is calculated by combining pieces of the first information, the calculation unit causes the part of the plurality of divided areas to vary in accordance with pieces of the first information.