A steering control system comprising, a steering operation processing circuit that controls a controlled variable (Ta*) for a motor so as to apply a steering force for steering steered wheels to a steering device in response to an operation of a steering wheel, wherein the steering operation processing circuit includes: a basic controlled variable calculation circuit that calculates a first component (Ta1*) that is a basic component of the controlled variable (Ta*) for the motor, based on a vehicle speed value that is a detected value of a traveling speed of a vehicle and a steering torque (Th) that is a detected value of a load applied to the steering wheel; a rotation angle command value calculation circuit that calculates a rotation angle command value (θp*) for a rotary shaft based on at least the vehicle speed value and the first component (Ta1+), the rotation angle command value (θp*) being convertible into a steered angle of the steered wheels; a feedback calculation processing circuit that calculates a second component (Ta2*) of the controlled variable (Ta*) for the motor by adjusting a rotation angle (θp) of the rotary shaft to the rotation angle command value (θp*) through feedback control, the rotation angle (θp) of the rotary shaft being a detected value; a control processing circuit (34, 35) that controls an operation of the motor based on the controlled variable (Ta*) for the motor, the controlled variable (Ta*) including the first component (Ta1*) and the second component (Ta2*); and a limited-state setting circuit that sets a first limited state when the vehicle speed value is equal to or lower than a reference vehicle speed value (Vth) that is a reference value at and below which it is determined that the vehicle is not traveling, the first limited state being a state where a variation range of the second component (Ta2*) is more limited than when the vehicle speed value is higher than the reference vehicle speed value (Vth), characterized in that the steering operation processing circuit sets the vehicle speed value to a provisional vehicle speed value that is higher than the reference vehicle speed value (Vth), during an abnormality determination period during which the vehicle speed value is determined to be abnormal, the basic controlled variable calculation circuit calculates the first component (Ta1*) based on the provisional vehicle speed value during the abnormality determination period, and during the abnormality determination period, the limited-state setting circuit sets a second limited state where the variation range of the second component (Ta2*) is more limited than when the vehicle speed value is not abnormal. a basic controlled variable calculation circuit that calculates a first component (Ta1*) that is a basic component of the controlled variable (Ta*) for the motor, based on a vehicle speed value that is a detected value of a traveling speed of a vehicle and a steering torque (Th) that is a detected value of a load applied to the steering wheel; a rotation angle command value calculation circuit that calculates a rotation angle command value (θp*) for a rotary shaft based on at least the vehicle speed value and the first component (Ta1+), the rotation angle command value (θp*) being convertible into a steered angle of the steered wheels; a feedback calculation processing circuit that calculates a second component (Ta2*) of the controlled variable (Ta*) for the motor by adjusting a rotation angle (θp) of the rotary shaft to the rotation angle command value (θp*) through feedback control, the rotation angle (θp) of the rotary shaft being a detected value; a control processing circuit (34, 35) that controls an operation of the motor based on the controlled variable (Ta*) for the motor, the controlled variable (Ta*) including the first component (Ta1*) and the second component (Ta2*); and a limited-state setting circuit that sets a first limited state when the vehicle speed value is equal to or lower than a reference vehicle speed value (Vth) that is a reference value at and below which it is determined that the vehicle is not traveling, the first limited state being a state where a variation range of the second component (Ta2*) is more limited than when the vehicle speed value is higher than the reference vehicle speed value (Vth), characterized in that the steering operation processing circuit sets the vehicle speed value to a provisional vehicle speed value that is higher than the reference vehicle speed value (Vth), during an abnormality determination period during which the vehicle speed value is determined to be abnormal, the basic controlled variable calculation circuit calculates the first component (Ta1*) based on the provisional vehicle speed value during the abnormality determination period, and during the abnormality determination period, the limited-state setting circuit sets a second limited state where the variation range of the second component (Ta2*) is more limited than when the vehicle speed value is not abnormal.