Thetford Township was officially established on February 10, 1842. The name of Thetford was selected by Nathan A. Wilson – taken from the town of Thetford, in Orange County, Vermont.

Today, Thetford Township is proud of its well-maintained roads. In 1990, the Thetford Senior Center was opened on Center Road just south of Vienna Road (M-57). They hold an Old-Fashioned Pig Roast there at the end of July each year. the Center also hosts a Halloween Party which is very well attended by area toddlers, children and adults.

Thetford Township is also very proud to have Ligon Land located on Farrand Road, between North Genesee Road and North Belsay Road. This development belongs to the Genesee County Intermediate School District. It is largely used by students of the school districts, but there are also tours at various times of the year.