Pierre-Alexis ("Pitre") Tremblay (December 27, 1827 – January 4, 1879) was a surveyor and Quebec political figure. He was a Liberal member of the Canadian House of Commons from 1867 to 1875 and 1878 to 1879.He was born at La Malbaie, Lower Canada in 1827 and studied at the Petit Séminaire of Quebec. Near the end of 1853, he began carrying out surveys in the Saguenay region.