| Littleton High School | |
| Principal: | John Harrington |
| Type: | Public Open enrollment[1] |
| Free Label1: | MCAS % proficient and advanced |
| Free Text1: | ELA: 98 Math: 94 Science: 97 (Spring 2011)[2] |
| Website: | School website |
| Streetaddress: | 56 King Street |
| City: | Littleton |
| State: | Massachusetts |
| Zipcode: | 01460 |
| Country: | United States |
| Coordinates: | 42.5411°N -71.5072°W |
| Nickname: | Tigers |
| Enrollment: | 463 (2017–18)[3] |
| Staff: | 36.60 (FTE) |
| Ratio: | 12.65 |
| Colors: | Blue, Gold |
| Opened: | 2002 |
| Sat: | 598 verbal 590 math 1198 total (2017-2018)[4] |
Littleton High School is a public high school located at 56 King Street, Littleton, Massachusetts, United States. It serves students in grades 9-12 from the town of Littleton.The building was opened in 2002. It was formerly located on the site of the current middle school from 1957 to 2002 on Russell Street. From 1924 to 1957 it was located on Shattuck Street in the building that now houses the town offices and the Reuben Hoar library. From 1957 to 1968 it was operated as a Junior/Senior high school and again from 1989 to 2002. Littleton High School (LHS) is known for its ability to produce both excellent athletes and students alike. Often finding both honors within the athletic and academic realm of achievements.