Born in 1927 to Phillias and Lucie LeBlanc, Roméo LeBlanc was the youngest child of seven. His early years were spent on a subsistence farm during the Depression. He so impressed his elementary school teachers, they persuaded the local college that he should be educated further. He graduated with a B.A. in 1948 from University of St. Joseph's College, New Brunswick, and went to work in Montreal for $14 a week as one of the editors for Jeunesse étudiantecatholique (a newsletter for Catholic students).

However, after his sibling Léonard was disabled in a car accident in 1949, Mr. LeBlanc returned home to assist the family.  In 1950, he went back to St. Joseph's College for a B.Ed. which would allow him to teach in the New Brunswick high school system.  He taught at Drummond in the north of New Brunswick from 1951 to 1953. In 1953, he won a France-Acadie scholarship to study at the Sorbonne, where Professor Bruneau, an eminent professor of linguistics, recognized his talent and organized Mr. LeBlanc's registration for a doctorate and supported him in his application for a further scholarship from Royal Society of Canada.  Mr. LeBlanc was successful and registered for a doctoral thesis "Teaching French in a bilingual district of Canada: New Brunswick, a case study."

In the spring of 1955, his eldest brother died of a brain tumour, leaving a widow and six children. Mr. LeBlanc once more went back to the farm and helped to stabilize the family financially.

He taught at the provincial Normal School in Fredericton from 1955 until 1959.  During these years, he came to know the English community in Fredericton well and built friendships among the Acadian communities throughout the province.