Allentown is an unincorporated community in Tazewell County, Illinois, United States.

[3] The name “Allentown” first appears on the Tremont Township plat map found in the 1891 Tazewell County atlas.

Allentown was a station of the Illinois Terminal Railroad interurban system for a number of years.

A plat map in the 1864 Tazewell County atlas indicates that a country school house was located near the center of Allentown.

[6] In the year 1892 residents of Allentown built a community hall, called the Allentown Union Hall, where community celebrations, church services, club meetings, local elections, and performances by traveling musicians and vaudevillians were held.