A lockable food delivery box apparatus for preventing food tampering and contamination includes an insulated box defining a storage cavity configured to store food items for delivery. A box lid is selectively engageable with an open side of the insulated box. An electronic lock is coupled to the insulated box and is in operational communication with the box lid to secure and alternatively free the box lid. The electronic lock has a transceiver configured to be in operational communication with a smartphone. A heating coil is coupled to the insulated box to raise the temperature within the storage cavity. A cooling system is coupled to the insulated box to lower the temperature within the storage cavity. A power supply is coupled within the insulated box and is in operational communication with the heating coil, the cooling system, and the electronic lock.