Mary C O'Brien Elementary School
| Name | Mary C O'Brien Elementary School |
| Grades | Class KG to Class 06 |
| Address | PO BOX 3125 |
| City | Casa Grande |
| School District | Mary C O'Brien Accommodation District (4435) |
| County | Pinal County |
| Zipcode | 85122-0366 |
| Phone No. | (520)450-4400 |
| State | Arizona |
| Rural | Distant |
| Students | 117 |
| Teachers | 11 |
| Student Teacher Ratio | 10 students per teacher |
| Charter School | No |
| Magnet School | N/A |
Mary C O'Brien Elementary School is located at PO BOX 3125 in Casa Grande city of Pinal County county in Arizona. This school comes under Mary C O'Brien Accommodation District (4435). You can call them at (520)450-4400 for more details. This is not a magnet school. Total one hundred seventeen students from class KG to class 06 study in this school who are taught by eleven teachers. This is not a charter school. The student teacher ratio of this school is 10.