| Address: | 70 East Patton Street |
| City: | St. David |
| State: | Arizona |
| Zipcode: | 85630 |
| Country: | United States |
| Type: | Public |
| Grades: | PreK–12 |
| Students: | 353 |
| Teachers: | 18.6 |
| Staff: | 37.38 |
| Ratio: | 18.98 |
St David School District 21 is a school district in Cochise County, Arizona.