Thomas-Jean-Jacques Loranger, (February 2, 1823 – August 18, 1885) was a Quebec judge and political figure.
He was born in Yamachiche in Lower Canada in 1823.
Loranger was elected to the Legislative Assembly of the Province of Canada for Laprairie in 1854; he was reelected in 1857.
He served on the Executive Council as secretary for Canada East.
He opposed the idea of a double majority, where legislation must be approved by a majority of the representatives from both provinces, but believed that legislation affecting one province should be approved by a majority in that province.
He supported Montreal as a capital and opposed the choice of Ottawa; this led to the resignation of the government of John A.
Macdonald and George-Étienne Cartier in 1858.
Loranger continued as a member in the legislature until he was named judge in the Quebec Superior Court in 1863.
In 1873, he published the first volume of Commentaire sur le Code civil du Bas-Canada, a discussion of the civil code of Quebec; a second volume was published in 1879 but the work was never completed.
He also contributed articles to legal journals of the time.
In 1877, he was named to head a commission to codify the general statutes of Quebec.