Thomas Johnson was born on November 4, 1732, at St. Leonard in Calvert County, Maryland, the son of Thomas Johnson Sr. and Dorcas Sedgwick Johnson. He grew up in a large family that later included several lawyers and public officials. The Johnsons possessed respectable property and connections but were not among the colony’s greatest proprietary families. His early education occurred in Maryland and prepared him for the law. He studied under Stephen Bordley, one of the province’s leading attorneys, rather than attending a formal law school. Apprenticeship required reading English legal authorities, copying documents, observing courts, and mastering the disputes over land, debt, inheritance, and commerce common in colonial practice. Johnson was admitted to the bar in 1753 and developed a successful practice in Annapolis. He married Ann Jennings, with whom he had a large family. Legal work, marriage, and property gradually established him among Maryland’s professional elite. He also acquired land and enslaved people, participating in the economic order of the Chesapeake. In 1762 Johnson entered the lower house of the Maryland assembly. He gained experience with provincial taxation, proprietary authority, and the recurring struggle between elected representatives and the governor. His legal temperament made him an effective drafter and negotiator rather than merely a popular speaker. Before becoming Maryland’s first elected governor and later a judge, Johnson had been shaped by a large provincial family, legal apprenticeship, early professional success, marriage, fatherhood, property ownership, and legislative experience. His resistance to Britain developed within the existing constitutional system. He initially sought to defend colonial rights through law and representative institutions, and only gradually embraced independence. This early formation helps explain his later ability to move from revolutionary leadership into the practical construction of state government.