| Fairfax High School | |
| Address: | 500 Main Street |
| City: | Fairfax |
| State: | Missouri |
| Zipcode: | 64446 |
| Country: | United States |
| District: | Fairfax R-III School District |
| Principal: | Dustin Barnes |
| Grades: | 7-12 |
| Enrollment: | 69 (2022-2023)[1] |
| Teaching Staff: | 9.00 |
| Ratio: | 7.67 |
| Nickname: | Bulldogs |
| Colors: | Green and white |
Fairfax High School is a rural secondary school (grades 7-12) in Fairfax, Atchison County, Missouri.
Fairfax High School is part of the Fairfax R-III School District. Fairfax Elementary School (K-6) feeds into Fairfax High School.