| Mt. Blue High School | |
| Motto: | Be here, be safe, be respectful, be responsible |
| Streetaddress: | 129 Seamon Road |
| City: | Farmington |
| State: | Maine |
| Zipcode: | 04938 |
| Country: | U.S. |
| Coordinates: | 44.6382°N -70.1321°W |
| Schooltype: | High School |
| Fundingtype: | State |
| District: | Mt. Blue Regional School District |
| Superintendent: | Tina Meserve |
| Principal: | Monique Poulin |
| Teaching Staff: | 51.00 (FTE) |
| Grades: | 9–12 |
| Enrollment: | 675 (2017-18)[1] |
| Ratio: | 13.24 |
| Athletics: | football, soccer, field hockey, golf, cross country, basketball, cheering, wrestling, skiing, track and field, softball, baseball, lacrosse. |
| Conference: | Northern Maine class A |
| Mascot: | Cougar |
| Team Name: | Mt. Blue Cougars |
| Rival: | Skowhegan High School |
| Publication: | School Newspaper |
| Yearbook: | Timaron |
| Language: | English |
| Hours In Day: | 7:45 A.M to 2:02 P.M. |
| Colors: | Blue and gold |
Mt. Blue High School is a public high school in Farmington, Maine, United States. The school includes grades 9–12 and is a part of the Mt. Blue Regional School District. It and enrolls students from the towns of Farmington, Weld, Temple, Wilton, Chesterville, New Vineyard, Industry, New Sharon, Starks, and Vienna. The school's athletic mascot is the cougar.
In 2009 Mt. Blue changed from MSAD to Mt. Blue Regional School District (RSD), to start the new changes to the School. The state of Maine issued the school 63,568,833 dollars for the new school. The school was completely redone, and finished in 2013. The new school cover 226,000s square feet, 35.8% bigger than the old school. The school is three stories tall, and is the largest school in Franklin County.
The women's alpine and nordic skiing team holds the state record for the most consecutive state championships in any sport. They train at Titcomb Mountain in Farmington.[2]