| Address: | 22540 Parrotts Ferry Road |
| City: | Columbia |
| Zipcode: | 95310 |
| Type: | Public |
| Grades: | Kâ8 |
| Students: | 433 (2020â2021) |
| Teachers: | 23.99 (FTE) |
| Staff: | 19.67 (FTE) |
| Ratio: | 18.05:1 |
Columbia Union School District is a public school district based in Tuolumne County, California, which serves 500 students in grades Kâ8.