Joseph Blanchard (1704 – 1758) was a prominent colonial American surveyor, mapmaker, lawyer, judge, and military officer from New Hampshire. He is best known for his extensive surveying work in New England, particularly for the influential "Map of the Province of New-Hampshire" (known as the Blanchard-Langdon Map), published posthumously in 1761, and for his military service during the French and Indian War.
Early Life and Family Joseph Blanchard was born in 1704 in Dunstable, Massachusetts, which later became Nashua, New Hampshire. He was the son of Joseph Blanchard Sr. and Abigail Davis. The Blanchard family was among the early settlers of the Dunstable area, and Joseph Jr. grew up with a strong understanding of the frontier environment. In 1727, he married Rebecca Hubbard, and together they had ten children. His large family and landholdings contributed to his influence in the growing colonial settlement.
Career Blanchard's career was multifaceted, reflecting the needs and opportunities of colonial New England.
- Surveying and Mapmaking: He developed exceptional skills as a surveyor, which were crucial for defining property lines, town boundaries, and charting the largely unexplored interior of New Hampshire and what would become Vermont. His most significant cartographic achievement was the "Map of the Province of New-Hampshire," which he began compiling in the 1750s. This map, completed and published posthumously in 1761 with the assistance of the Rev. Samuel Langdon, was highly accurate for its time and remained the authoritative map of the region for decades. It detailed towns, rivers, mountains, and Native American trails, and was invaluable for both settlement and military operations.
- Legal and Judicial Service: Blanchard also pursued a career in law. He was a practicing lawyer and served as a justice of the peace. His legal acumen led to his appointment as a judge of the Court of Common Pleas for Hillsborough County, New Hampshire, a position he held for many years. He also represented his town in the New Hampshire General Court (the colonial legislature).
- Military Officer: With the outbreak of the French and Indian War, Blanchard's knowledge of the frontier and his leadership skills made him a natural choice for military command. He was commissioned as a colonel in the New Hampshire provincial regiment. In 1755, he commanded a contingent of New Hampshire troops during Sir William Johnson's expedition against Crown Point. Although the main force suffered heavy losses at the Battle of Lake George, Blanchard's regiment played a role in the broader campaign. He continued to serve throughout the conflict, contributing to the defense of the New England frontier.
Legacy Joseph Blanchard died in 1758, likely in Dunstable (Nashua), New Hampshire. His most enduring legacy is the Blanchard-Langdon Map, which provided critical geographical intelligence and facilitated the further settlement and development of New Hampshire and Vermont. His contributions as a surveyor, lawyer, and military leader underscore his importance as a key figure in colonial New England during a period of significant expansion and conflict. Many of his descendants continued to be prominent in New Hampshire.