|Elevation||577 ft (176 m)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|GNIS feature ID||422821|
Hopper was originally named Warren, Illinois. The village was laid out by Lambert Hopper on March 25, 1840. It was often called Hopper's Mill in the 19th century because Lambert Hopper and his son, Wesley Hopper, operated a thriving lumber mill in the area.
For more information, see page 889 of the  "History of Mercer and Henderson Counties" published by the H. H. Hill & Company, Chicago in 1882.