| Altar Valley School District 51 | |
| Motto: | Challenging all students to achieve excellence |
| Address: | 10105 South Sasabe Road |
| City: | Tucson |
| State: | Arizona |
| County: | Pima County |
| Zipcode: | 85736-1226 |
| Country: | United States |
| Type: | Public school district |
| Grades: | PK–8 |
| Superintendent: | David Dumon |
| Schools: | Robles Elementary (PK–4), Altar Valley Middle School (5–8) |
| Budget: | $9,340,000 |
| District Id: | AZ-4418 |
| Students: | 585 |
| Teachers: | 23.5 |
| Staff: | 58.18 |
| Ratio: | 24.89:1 |
| Free Label: | Governing board members |
| Free Text: | [1] |
Altar Valley School District 51 is a public school district in Pima County, Arizona, United States.
In 2011, the Altar Valley School District Governing Board was named the Lou Ella Kleinz Award of Excellence recipient by the Arizona School Boards Association. This is ASBA's highest honor.