Hope Township is a township in Warren County, New Jersey, United States. As of the 2010 United States Census, the township's population was 1,952, reflecting an increase of 61 (+3.2%) from the 1,891 counted in the 2000 Census, which had in turn increased by 172 (+10.0%) from the 1,719 counted in the 1990 Census. The 2010 Census population marked the first decennial census in which the township's population exceeded the 1,903 recorded in the 1840 Census, the first recorded population after the township was formed.
Hope Township was incorporated as a township by an Act of the New Jersey Legislature on April 8, 1839, from portions of Knowlton Township and Oxford Township, based on the results of a referendum held that day. Liberty Township was created on March 25, 1926, from portions of the township.