The first post office named was established in the township was in 1839 between Half Day and McHenry, until it was disestablished in 1842.

The church initially was made up of sixteen members, twelve of which were from Hartford, New York.

"Fremont" was chosen as a compromise name after the explorer and future presidential candidate John C. Frémont.

The first supervisor appointed was Hurlburt Swan, a man from Connecticut who also served in the Illinois General Assembly.

During the American Civil War, over 120 people from the township enlisted for the military, killing 34 during the conflict.