John Rogers was born in Maryland in 1723, most probably at Annapolis, although later accounts also associate him closely with Upper Marlboro in Prince George’s County. The names and circumstances of his parents are not consistently supplied in standard congressional biographies. What is clear is that he received what the Biographical Directory of Congress calls a “liberal schooling,” an education broad enough to prepare him for the law and for service among Maryland’s provincial elite. Such schooling ordinarily emphasized English composition, classical learning, moral philosophy, and the habits of argument needed in public life, but no surviving source consulted for this entry identifies a particular school or tutor.

Rogers studied law through the customary apprenticeship or office-reading system rather than at a modern law school. A prospective Maryland attorney learned English common law, provincial statutes, property rules, legal forms, and courtroom practice under an established practitioner. After admission to the bar, Rogers began practicing in Upper Marlboro. The town was the governmental center of Prince George’s County, and legal work there placed him among planters, merchants, officeholders, and litigants whose affairs were shaped by land, tobacco, debt, inheritance, and enslaved property.

By the 1760s and early 1770s, Rogers had become a prominent lawyer and resident of Upper Marlboro. His profession gave him both social standing and practical familiarity with the constitutional relationship between Maryland and the British Empire. Like many colonial lawyers who later entered revolutionary politics, he learned to treat charters, statutes, precedent, and representative authority as questions with immediate local consequences.

Rogers’s early life ended as imperial controversy moved into organized resistance. In 1774 and 1775, he served on Maryland’s committee of safety and took part in the provincial conventions that began replacing royal authority. He signed the Association of the Freemen of Maryland in July 1775 and was elected to the Continental Congress that December. Those appointments marked his transition from an established county lawyer into the revolutionary public service for which he is remembered.