[3] In 1917, a new brick high school was constructed in the northern section of town to accommodate a growing student enrollment, and it went through several additions in later years.

That building served the community until 2002,[4] when a new high school was constructed on the northwest side of the city.

In 2011, Mendota joined the Big Northern Conference (BNC) in all sports, except for football.

On the 2010 Prairie State Achievement Exam, 58% of Mendota High School 11th graders met or exceeded standards in Reading.

The Mendota drama department puts on dramatic productions, a play every fall, one every summer, and a musical every other spring.

This is possibly due to the amount of small towns encompassed within the boundaries of the district.