He was appointed to the Senate of Canada on October 18, 1873, and represented Prince Edward Island as a Conservative until his resignation in July 1879.

[1] Thomas Heath Haviland was born on November 13, 1822, in Charlottetown, Prince Edward Island, to Thomas Heath Haviland Sr., an English-born emigrant to Prince Edward Island and wealthy landowner,[2] and Jane Rebecca Brecken.

He was elected to the Legislative Assembly of Prince Edward Island for Georgetown and Royalty in 1846 and served until 1876.

In 1886, he became mayor of Charlottetown after the death of Henry Beer, serving until 1893 when he retired due to poor health.

[4] Haviland married Anne Elizabeth Grubbe on January 5, 1847;[3] they had seven children, two of whom died during infancy.