Benjamin Hallowell was born in Boston on February 2, 1725, the eldest of eight children in a long-established merchant and shipbuilding family. His father, also Benjamin Hallowell, was extensively involved in trade, served as an agent for the Royal Navy, and owned interests in ships, land, and the Kennebec region of Maine. The family shipyard stood near the meeting of Batterymarch and Milk Streets, close to Boston’s busy waterfront.

Growing up around the yard gave the younger Hallowell direct exposure to carpenters, riggers, sailmakers, sailors, merchants, customs officers, and naval suppliers. No detailed record of his formal schooling has been identified, but his career required navigation, accounts, correspondence, knowledge of cargoes, and command at sea. Much of that preparation was likely practical and familial rather than collegiate.

By his early twenties Hallowell was commanding armed merchant ships and privateers. During King George’s War, British colonists commissioned private vessels to attack French shipping, combining commerce with warfare. A young captain had to recruit and discipline a crew, maintain a vessel, read weather and coastlines, manage provisions, and make rapid decisions under threat. Hallowell gained a reputation for boldness in encounters with French privateers.

In 1746 he married Mary Boylston, a member of another wealthy Boston family. Their marriage strengthened his connection to imperial merchants and officeholders; their children included a future Royal Navy admiral, also named Benjamin. Hallowell continued maritime and commercial work as Britain and France competed across the Atlantic. His family’s prosperity connected private business to the expanding machinery of the British Empire.

These experiences explain the political path he later chose. Hallowell’s identity was formed not only as a Bostonian but as the beneficiary and servant of imperial trade and naval power.