Callan, County Kilkenny
Cudahy was born on St. Patrick's Day in Callan, County Kilkenny, Ireland. A few months after he was born, his family moved to Milwaukee, Wisconsin. He worked his way up at the Plankinton and Armour meat packing plant in the Menomonee River Valley, becoming the superintendent in 1874. In 1888, the owner, John Plankinton, transferred the company to Patrick and his brother, John. The company became known as Cudahy Brothers.