He said the "vulnerable nature of the boy" gave police serious concerns for his safety - so they spent the night looking for him.
Hamilton Police spent almost five hours scouring nearby streets and parks, before finally locating the boy in a park near Sandwich Rd.
"He was exhausted, cold and disoriented when he was found but is now at home, safe and well. He was offered medical assistance before being reunited with his relieved and emotional family."