| Harvard High School | |
| Streetaddress: | 1103 N Jefferson St |
| City: | Harvard |
| State: | Illinois |
| County: | McHenry County |
| Zipcode: | 60033 |
| Country: | USA |
| Coordinates: | 42.4283°N -88.6095°W |
| District: | Harvard Community Unit School District #50 |
| Superintendent: | Dr. Corey Tafoya |
| Principal: | Carl Hobbs |
| Teaching Staff: | 63.55 (FTE) |
| Ratio: | 11.64 |
| Gender: | coed |
| Type: | public |
| Grades: | 9–12 |
| Campus: | rural |
| Hours In Day: | 6 hours 45 minutes |
| Conference: | Kishwaukee River Conference[1] |
| Nickname: | Hornets |
| School Colours: | black gold[2] |
| Yearbook: | The Hornet |
| Newspaper: | "The Buzz" |
| Opened: | 1921 |
| Enrollment: | 755 (2019-20)[3] |
| Homepage: | cusd50.org |
Harvard High School, also known as HHS, is a 4-year public high school located in Harvard, Illinois, about 4 miles south of Wisconsin and 80 miles northwest of Chicago. It is part of the Harvard Community Unit School District 50, along with Richard D. Crosby Elementary School (K-3), Jefferson Elementary School (4-5), Washington Elementary School (PreK), and Harvard Jr. High School (6-8).
The school opened in 1921, and has undergone many renovations since then. Its most recent renovation was in 2014, adding a new wing to the second floor and remodeling the cafeteria.
Harvard High School is part of the Kishwaukee River Conference. Its mascot is the Hornet, and it offers the following sports: