Police say was the child was left unattended for nearly 3 hours while Bryan Bolds was inside playing blackjack.
Police arrived on scene after a passerby heard the child crying and yelling for his father.
Officers transported the child back to police headquarters and later, with the help of the Pennsylvania State Police and Parx Casino Security, took custody of Bolds at a gaming table.
Bolds, 32, is charged with Endangering the Welfare of a Child and has been ordered not to have any contact with his son.
The child has since been reunited with his mother.