[5] The town's history is tied to politician "Long John" Wentworth and his efforts to move the Illinois border with Wisconsin from being even with the bottom of Lake Michigan to its present location.

If those efforts had not been successful, the state line would reside along the LaSalle-DeKalb County border, placing the incorporated community in Wisconsin.

It is one of the oldest continuing county fairs in Illinois, drawing daily crowds of more than 100,000, with top attendance days reaching over 200,000.

Lake Davis, which stretched from Veterans Memorial Park to what is now Gletty Road, was drained early in the 19th century to open up additional farmland.

The last earthquake along the Sandwich Fault was on February 10, 2010, with a previous tremor being reported in January 2007.

Sandwich High School is an active member of the Interstate Eight Conference, and competes in IHSA regulated sports competitions.

Sandwich also takes advantage of being in the Waubonsee Community College tax district.

Sandwich is home to the Sahara-Pak heat-of-compression air dryer, a design patented in 1974 by Henderson Engineering, which is considered by many industry observers to be the most significant development ever made in the design of equipment for drying compressed air.

Sandwich has a strong manufacturing history, which is evident by the presence of the Plano Molding Company factory, which makes molded plastic furniture, tackle boxes, organization equipment, and other various items.

[14] Although many factories in the area have been closed down or relocated, the community will continue to be a site of manufacturing for some time to come.