Jacob Pozer (1777 – October 15, 1822) was a businessman and political figure in Lower Canada.
He represented William-Henry in the Legislative Assembly of Lower Canada from 1812 to 1814.
He operated a brewery leased from John Young and was also involved in farming and raising horses.
He was elected to the assembly in an 1812 by-election held after Edward Bowen was named to the bench; Pozer did not run for reelection in 1814.
His niece Georgianna Maria Pozer married John Pickel.