Castle Hill is a town in Aroostook County, incorporated on February 25, 1903, from Castle Hill Plantation. According to George Varney*, the 1886 landscape of the then plantation appeared as follows:
It is on the stage-line [Route 227] from Presque Isle to Ashland. . . . The township is without high hills and large ponds. . . . The Universalists and the Baptists have societies in the town, and sustain ministers a portion of the time. The plantation has six public schoolhouses . . .
Castle Hill’s population in 1870 was 237, leaping to 419 in 1880. The 1,341-foot-high Haystack Mountain is the only exception to Varney’s characterization of the landscape. — Maine, an Encyclopedia