Hamlin was a plantation in Aroostook County, organized on July 11, 1859, for election purposes and formally organized for general purposes on March 5, 1895. Originally, the township was known as Letter G R1, WELS. Now it is an organized town. According to George A. Varney in his Gazetteer, Hamlin’s population was 568 in 1870 and 612 in 1880, not much different from the current level.