An insulated cooler with an integral padlock system comprises a hinged lid and a padlock receiving loop located on the lid. A second, corresponding receiving loop is disposed on the cooler. When closed, a user can apply a padlock to the first and second receiving loop simultaneously to lock the lid in a closed position to enable a user to leave the cooler unattended while full of food or beverages in a public location and prevent unauthorized persons and animals from getting into the cooler.