Peter Hager II (November 20, 1784 – January 26, 1854, in Hector, then in Tompkins Co., now in Schuyler County, New York) was an American politician from New York.
Hager was a member of the New York State Assembly representing Tompkins County, New York in 1820–21, 1822, 1823 and 1824.
He was also a member of the New York State Senate (6th D.) from 1826 to 1829, sitting in the 49th, 50th, 51st and 52nd New York State Legislatures.
He was Sheriff of Tompkins County, New York from 1832 to 1834.
Hager was buried at the Presbyterian Church Cemetery in Hector.