Mercer County High School, or MCHS, is a public four-year high school located at 1500 South College Avenue in Aledo, Illinois, a city in Mercer County, Illinois, in the Midwestern United States.

[3] The campus is located in Aledo, IL, 30 miles southwest of Moline, Illinois, and serves a mixed city, village, and rural residential community.

[4] her name is miss Ruth in the student's name is sydney For academic year ending 2009, both Aledo High School and Westmer High School were Fully Recognized by the state for making yearly progress and adhering to state testing and standards.

Westmer High School made Adequate Yearly Progress in 2009 on the Prairie State Achievement Examination, a state test that is part of the No Child Left Behind Act; whereas Aledo High School did not make Adequate Yearly Progress.

Aledo residents began offering educational opportunities to their children in the mid-19th century.

It was in the spring of 1960 the decision was made to merge the educational resources of these three towns, and of nearby Eliza, to create a new district.

Since all towns involved in this merger were located in the western portion of Mercer County, a unique name emerged for the district.

The high school was situated at a location that gave it an address in Joy, Illinois.

In the fall of 2008 the voters of Aledo and Westmer agreed to support a consolidation effort between the two schools.

The original Joy High School doubled as a church until a new building was built in 1937.

Students were relocated from the second floor of the high school in Joy Park to the new facility during the Christmas Vacation in 1937.

In 1960 a consolidation effort between the schools and communities of western Mercer County, including New Boston and Keithsburg, took place.

Joy was included in this effort and was fortunate to land the high school in their town.